Question

Solve the equation
2x-y=-10 ,-6x+3y=30
By substitution,elimination,graph and cross multiplication method

Answer 1

from equation 1 we get
$x = \frac{ - 10 + y}{2}$
put it in equation 2
$- 6( \frac{ - 10 + y}{2} ) + 3y = 30$
that is