Question

Solve the following system using the substitution method.

x + 3y = -5
5x + 6y = -19

Answer 1

rewrite the 1st equation so that 3y = -5 - x

and substitute it into the 2nd equation

5x + 2(3y) = -19

or

5x + 2(-5 - x )= -19

which becomes

5x - 10 - 2x = -19

simplifying gives

3x - 10 = -19

now solve for x.

when you have a value for x just substitute into either equation to find y

Answer 2

ok