Question

a) 18x-4=10x+4

b) 20x+6=15x+16

c)15x-9= -15x+21

d)7x-10=-3x

Answer 1

a) 18x-10x=4+4
8x=8
x=8
8
×=1

b) 20x-15x=16-6
5x=10
x=10
5
x=2

c) 15x+15x=21+9
30x=30
x=30
30
x=1

d) 7x+3x= 10
10x=10
x=10
10
x=1

e)30x-12=16x+16
30x-16x=16+12
14x=28
x=28
14
x=2

Answer 2

Oi

a) 18x - 4 = 10x + 4

18x - 10 = 4 + 4

8x = 8

x = 8/8 ÷ 8

x = 1

b) 20x + 6 = 15x + 16

20x - 15x = 16 - 6

5x = 10

x = 10/5 ÷ 5

x =2

c) 15x - 9 = - 15x + 21

15x + 15x = 21 + 9

30x = 30

x = 30/30 ÷ 30

x = 1

d) 7x - 10 = - 3x

7x +3x = 10

10x = 10

x = 10/10÷ 10

x = 1

Bons estudos