Question

j)
3х – 8 = 13
-
k)5×-12=4×+17
l)8×-9=2+11
m)7×+5=68-2×
n)×-1=-8
​

Answer 1

j.

3x - 8 = 13

3x = 13 + 8

x = 21 ÷ 3

x = 7

k.

5x - 12 = 4x + 17

5x - 4x = 17 + 12

1x = 29

x = 29

l.

8x - 9 = 2 + 11

8x = 13 + 9

x = 22 ÷ 8

x = 2,75

m.

7x + 5 = 68 - 2x

7x + 2x = 68 - 5

9x = 63

x = 63 ÷ 9

x = 7

n.

x - 1 = - 8

x = - 8 + 1

x = - 7