Answer:
Step-by-step explanation:
7x - 2(7x - 9) = 2(-6x + 4) Remove the brackets on both sides.
7x - 14x + 18 = -12x + 8 Combine like terms
-7x + 18 = -12x + 8 Add 12x to both sides
-7x+12x + 18 = 8 Combine like terms on the left
5x + 18 = 8 Subtract 18 from both sides
5x = 8 - 18
5x = -10 Divide by 5
x = - 10/5
x = - 2 Proof
LHS
7*-2 -2(7*-2 - 9) -14 - 2*(-14 - 9)
-14 -2 (-23)
-14 + 46
32
RHS
2(-6*-2 + 4)
2(12 + 4)
32
