Question

Use addition or substitution to find the value of y for this set of equations.
2x - 3y = -15
x = 4y

Answer 1

your job is to solve
\[2\times 4y-3y=-15\]

Answer 2

8y-3y=-15..

Answer 3

x = -12, y = -3

Answer 4

sub x in eqn (1), 5y = -15, y = -3

Answer 5

x = 4y, x = 4 * -3 = -12