Question

solve the linear system by using substitution.
3x+3y=-18
4x-y=-14

Answer 1

take the 2nd equation and make y the subject.

so

4x + 14 = y

and substitute it into the 1st equation

3x + 3(4x + 14) = -18

or

3x + 12x + 42 = -18

now solve for x

Answer 2

idk how

Answer 3

oops ... collect like terms

15x + 42 = -18

subtract 42 from both sides of the equation

then divide by 15

Answer 4

thanks

Answer 5

when you get a value for x, substitute it into either equation to find y

Answer 6

oh ok