Question

resolva a equaçao 2+(-b-7)=b-0,5(b-4)

Answer 1

2-b-7 = b-0,5b+2
-b-b+0,5b= 2-2+7
-2b+0,5b = 7
-1,5b = 7 (.-1)
1,5b = -7
b = -7/1,5
b = -4,6 ( aproximadamente)