Question

Упростить вsражения
5(a+2)+(a+2) (x-3)-3(x-3) 7(x-7)-3(x-3)

Answer 1

$5(a + 2) + (a + 2) = \ = 5a + 10 + a + 2 = \ = 6a + 12 = \ = 6(a + 2)$
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$(x - 3) - 3(x - 3) = \ = x - 3 - 3x + 9 = \ = - 2x + 6 = \ = 2( - x + 6) = \ = 2(6 - x)$
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$7(x - 7) - 3(x - 3) = \ = 7x - 49 - 3x + 9 = \ = 4x - 40 = \ = 4(x - 10)$