Упростите выражения. 12a - 10b -10a + 6b, 8x - (2x + 5) + (x-1), 4(3x - 2) + 7

Question

Упростите выражения.
12a - 10b -10a + 6b,
8x - (2x + 5) + (x-1),
4(3x - 2) + 7

Answer 1

12a - 10b - 10a +6b = 2a - 4b
8x - (2x + 5) + (x - 1) = 8x - 2x - 5 + x - 1 = 7x - 6
4 (3x - 2) + 7 = 12x - 8 + 7 = 12x - 1

Answer 2

12a - 10b -10a + 6b=12a-10a+6b-10b=2a-4b
8x - (2x + 5) + (x-1)=8x-2x-5+x-1=7x-6
4(3x - 2) + 7=12x-8+7=12x-1