a) 3(a+b)+(a-2b) = 3a+3b+a-2b = 4a+b
b) -4(x-z)-(x+y) = -4x+4z-x-y = -5x+4z-y
c) 5(4x-7)+(7-4x) = 20x-35+7-4x = 16x-28
a) 3(a+b)+(a-2b) = 3a + 3b + a - 2b = 4a - b
b) -4(x-z)-(x+y) = -4x + 4z - x - y = -5x + 4z - y
c) 5(4x-7)+(7-4x) = 20x - 35 + 7 - 4x = 16x - 28
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a) 3(a+b)+(a-2b) = 3a+3b+a-2b = 4a+b
b) -4(x-z)-(x+y) = -4x+4z-x-y = -5x+4z-y
c) 5(4x-7)+(7-4x) = 20x-35+7-4x = 16x-28
a) 3(a+b)+(a-2b) = 3a + 3b + a - 2b = 4a - b
b) -4(x-z)-(x+y) = -4x + 4z - x - y = -5x + 4z - y
c) 5(4x-7)+(7-4x) = 20x - 35 + 7 - 4x = 16x - 28