Question

Resolva as equações abaixo
1) x - 3 = 9
2) 4x - 9 = 1 - 2x
3) x + 5 = 20 - 4x
4) 9x - 4x + 10 = 7x – 30
5) 5x -3+2x=4
6) 22=5x +2

Answer 1

1.

×-3=9

×=9+3

×=12

2.

4×-9=1-2×

4×+2×=1+9

6×=10

×=10÷6

×=1,6

3.

×+5=20-4×

×+4×=20-5

5×=15

×=15÷5

×=3

4.

9×-4×+10=7×-30

9×-4×-7×=-30-10

-5×-7×=+40

+12×=+40

×=40÷(-12)

×=40÷12

×=3,3

5.

5×-3+2×=4

5×+2×=4+3

7×=7

×=7÷7

×=1

6.

22=5×+2

5×=+2-22

5×=-20

×=-20÷5

×=-4

Espero ter ajudado