algebra
posted by Rose .
solve the system by the method of substitution
x4y=21
3x+y=2
I got (0,2)
Try plugging in x=0 and y=2 into your first equiation and uopu will that your answer must be wrong.
Do it this way:
x  4y =21
12x+ 4y =8
13 x = 13
x = 1
y = 2  3x = ?
x=0 and y=2 does not satisfy the first equation.
(0)4(2)=08=8 but that isn't equal to 21.
Respond to this Question
Similar Questions

Substitution Method
Use the Substitution method to solve the system of equations. x + y = 4 x  y = 2 x + y = 4 x  y = 2 In the second equation, x= y+2 Putting that in the first.. (y+2) + y= 4 subtract two from each side, then divide each side by … 
Substitution MethodPlz help
Use the Substitution method to solve the system of equations. x + y = 4 x  y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=4 (y+2) + y = 4 solve for y. Then, x= y+2 i don't get it.How … 
algebra
Solve for s in this equation. Depreciation. D=Cs/n This is my answer DC=Cs/nc DC=s/n n(DC)=s/n*(n) nD+nC=s s=n(CD) Please chack to see if this is correct Looks fine to me. A slightly shorter (by 2 lines) rearragement is: … 
algebra
Requesting help. (I must reckon, that X is a variable, and y is yintercept) Q: Try to use the substitution method to solve the the linear system y=3x an y=3x7. What do you notice? 
Algebra
Solve the system of equations using substitution. x + 4y = 5 3x  8y = 45 When I tried to solve it, I got x=17 and y=3. When I plugged these into the first equation, it didn't work out at all. Could someone please show me the steps … 
Linear Equations
Can you please help solve this equation using the substitution method? 
introductory algebra
I had these problems on my test and for some reason got them wrong. Here are the problems: Solve: xy=9 x+y=1 The test states that the answer is (5,4) I've checked ,y work and used substitution to solve this and still get x=4, y=5. … 
algebra
i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y  1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations … 
Algebra Multiple Choice
Hello, This is the last of questions I have for my practice assignment. Again I will put what I got. Thanks for your help. 1.) Solve the system using substitution. Write answer as an ordered pair. 4x+2y=8 5x2=y A.) First equation … 
Algebra
Ok, I tried watching a video on how to solve a system by substitution. But I feel like I did it wrong, so can someone check my work and show/ tell me where I went wrong. So the system by substitution 2x3y=2 Y=2x+6 First I combined …