To solve the system of equations, which expression could be substituted for x into the first equation?
3x-5y=14
x+4y=10
a)10-4y
b)4y+10
c)(1/4)x+(5/2)
d)(-1/4)x+(5/2)
Since x + 4y = 10,
x = 10 -4y
That is all they are asking for. They aren't asking you to solve the two equations.
the firsr equation of the system is mutiplied by 2,by what number would you mutiply the second equation to eliminate the x variable by adding. first:6x - 5y =21 4x+7y= 15 when i did the promblem i got 2 chooses -3 or -2 im not sure which one
the first equation of the system is mutiplied by 4, by what number would you mutiply the second equation to eliminate the y variable by adding? first: 2x+5y=16 second:8x - 4y =10 i got 2 0r 5 im not sure which one
To find the expression that could be substituted for x into the first equation, you need to rearrange the second equation to solve for x.
The second equation is: x + 4y = 10.
To solve for x, you can subtract 4y from both sides of the equation:
x = 10 - 4y.
Now, you have an expression for x that can be substituted into the first equation.
Looking at the answer choices:
a) 10 - 4y: This matches the expression we derived for x, so it could be substituted into the first equation.
b) 4y + 10: This is the same as the expression we derived for x, so it could be substituted into the first equation.
c) (1/4)x + (5/2): This is not the same as the expression we derived for x, so it cannot be substituted into the first equation.
d) (-1/4)x + (5/2): This is not the same as the expression we derived for x, so it cannot be substituted into the first equation.
Therefore, the correct answer is either a) 10 - 4y or b) 4y + 10.