Question

resolva as seguintes expressão:

A) 12x+3(x-6)=8x-24
B) m+2-5(m+1)=49-2(m-2)
C)0,5b+4=-10-0,2b

Answer 1

(A) 12x+3x-18=8x-24
15x-8x=-24+18
6x=-6
x= -6/6
x= -1

(B) m+2-5(m+1)=49-2(m-2)
m+2-5m+5=49-2m-4
-4m+2m=49-4-5-2
-2m=38
m=38/-2
m=-19

(C) 0,5b+4=-10-0,2b
0,5b+0,2b=-10-4
0,7b=-14
b=-14/0,7
b=-20