Asked by Anonymous
solve by elimination method
7x+15y=32
x-3y=20
7x+15y=32
x-3y=20
Answers
Answered by
drwls
Plug in 20 + 3y for x in the first equation, and solve the resulting equation for y. Here's how it starts off.
7(20+3y) + 15y = 32
140 + 21y + 15y = 32
36 y = 108
Take it from there
7(20+3y) + 15y = 32
140 + 21y + 15y = 32
36 y = 108
Take it from there
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