math
posted by neil hannit .
solve for x and y when 5x3y2=0 and 7x+y=0.
Please this is sooo hard. no clue how to do it. please show me how to do it.

5x  3y = 2
7x + y = 0
Triple the last equation (both sides)
21x + 3y = 0
Add the first and third equations:
26x = 2
x = 1/13
5/13  3y = 2 = 26/13
3y = 21/13
y = 7/13
Respond to this Question
Similar Questions

MATH EMERGENCY!!
Please help. I know I asked this before, but the answer was lost during the upgrade. Show that 0.00317 is a rational number by writing it as a quotient of integers. (the 317 has a line over it.) please help. thats hard really hard … 
math 12
i got the wrong answer from the back, and i know that imnot dooing it right. please try to help me on this hard question. THE ANSWER WAS:16 solve the equation: 3log(x15)= (1/4)^x i don't know how to solve it algerbrically. the teacher … 
math
2. Simplify. Please be sure to show all of your work. 3(9) – 5 – 3 3. Simplify. Please show all of your work 9c^3+7c(3c^312+c) 4. Solve 4x 3(5x8) =239(x+2) . Please show all of your work 5. Solve the following equation … 
5th grade Math
Clue 1: i am greater than 100,000, but less than 120,000. Clue 2: I am divisible by 3. Clue 3: The sum of my digits is 6. Please expalin answer. Thank you. 
math
9h6+12h+40=22 solve the equation I don't have a clue please help 
Algebra
Help please (x^3 + 3x^2  2x+7)/(x+1)=11 I don't how how to solve this at allthe answer should be 11 but I don't have a clue how to get itplease show me this one so I can hopefully do my homeowrkwe did this in class today but I … 
math
Can someone please help me with this word problem!? 
MATHS
Critical help please. Level 3 maths algebraic methods is really hard. Q) Two functions f and g are defined by f:x (arrow) x^2 + 3 g:x (arrow) 2x+1 Find a) the function fg b) solve the equation f(x)=12g^1(x) I need to show my working … 
college algebra
Solve the following inequality. x^3+9x^2108 less or equal to 0. Then write your solution in interval notation. I am sooo confused and do not have any idea how to do this. Can someone please show me step by step please? 
Algebra 2
More About Complex Numbers: Solve x and y 4x+5y+13i=7+(6x+5y)i Please show work because I had a hard time finding the answer