bjr
3
A = 5 (x + 7 + y)
= 5x + 35 + 5y
B = 8 (x+13) = 8x + 104
C = x (y + 9 - z) = xy + 9x - xz
D = 7x + 21 + 10 - 5x = 2x + 31
E = 5x + 15 = 5x + 3*5 = 5 (x+3)
F = 3x - 18 = 3x - 3*6 = 3 (x-6)
G = 7x + 9x - x² = -x² + 16x = x (-x + 16)
H = 4*2x + 4*1y - 4*4z + 4*3a = 4(2x + y - 4z + 3a)
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bjr
3
A = 5 (x + 7 + y)
= 5x + 35 + 5y
B = 8 (x+13) = 8x + 104
C = x (y + 9 - z) = xy + 9x - xz
D = 7x + 21 + 10 - 5x = 2x + 31
E = 5x + 15 = 5x + 3*5 = 5 (x+3)
F = 3x - 18 = 3x - 3*6 = 3 (x-6)
G = 7x + 9x - x² = -x² + 16x = x (-x + 16)
H = 4*2x + 4*1y - 4*4z + 4*3a = 4(2x + y - 4z + 3a)