Question

resolva as equaçoes:
a) 6(4-a)-12= -5(2a+4) b)17a+15-5a-10=10a-10 c)12x-8=7x-8

Answer 1

a) 6(4-a)-12=-5(2a+4)

24-6a-12=-10a-20

-6a+10a=-20+12-24

4a=-44+12

4a= -32

a= -32
__
4

a=-8

B)17a+15-5a-10=10a-10

12a-10a= -10-15+10

2a=-15

a= -15
__
2

a=7,5

C)12x-8= 7x-8

12x-7x = -8+8

5x = 0

x= 0
__
5

x=0