5x-4(3x-1)-5(2+7x)=15x-9(x-2)
问题描述:
5x-4(3x-1)-5(2+7x)=15x-9(x-2)
答
5x - 4(3x - 1) - 5(2 + 7x) = 15x - 9(x - 2)
5x - 12x + 4 - 10 - 35x = 15x - 9x + 18
-42x - 6 = 6x + 18
6x + 42x = -6 - 18
48x = -24
x = (-24)÷48
x = -0.5