1) 4(5-x) = -5x + 220 - 4x = -5x + 215 = x
2) 3 - 5x = 05x = 3x = 3/5
3) 5(3 - 2x) - (12 + 7x) = 015 - 10x - 12 - 7x = 03 = 17xx = 3/17
1) 4(5-x) = -5x + 2
20 - 4x = -5x + 2
15 = x
2) 3 - 5x = 0
5x = 3
x = 3/5
3) 5(3 - 2x) - (12 + 7x) = 0
15 - 10x - 12 - 7x = 0
3 = 17x
x = 3/17