(3-2x)+(4-3x)+(5-5x)=12+7x
3 – 2x + 4 – 3x + 5 – 5x = 12 + 7x
– 2x – 3x – 5x – 7x = 12 – 5 – 4 – 3
x = 0
(3-2x)+(4-3x)+(5-5x)=12+7x
3 – 2x + 4 – 3x + 5 – 5x = 12 + 7x
– 2x – 3x – 5x – 7x = 12 – 5 – 4 – 3
x = 0