Question

Resolva
a) 3×-3=8-×
B)3×+3=12 (2-×)
c) 2×-2.(10-2×)=4
D) 3×+5=10 (×-3)

Answer 1

a)3×+×=8+3

4×=11

×=11
4

b)3×+3=24-12×

3×+12×=24-3

15×=21

×= 21÷3

15÷3

×=7
5

c) 2x-20+4×=4

2×+4×=4+20

6×= 24

x=24÷2

6÷2

×=12÷3
. 3÷3

×=4

d)3×+5= 10×-30

3×-10×=-30-5

(-1)- 7×= -35

7x= 35

×=35÷7
7÷7

×=5