Question

find the solution to the system of equations

\[3b-a=-7\]
\[5a+6b=14\]

Answer 1

Multiply both sides of the first equation by 5

15b - 5a = -35
5a + 6b = 14

Then add both equations together:
(5a - 5a) + (15b + 6b) = (14 - 35)

Then finish solving for b. Afterwards, solve for a

Answer 2

got it! thank you!! :) i couldn't remember the rule :)