Question

1.3x + 1.2 =4.5 2.1/2:1/3 =1/4:x 3.3/4x - 2 =1.6 4.(0.4+x)×6

Answer 1

1.3x + 1.2 =4.5

3x=3.3

x=1.1

2.1/2:1/3 =1/4:x

1/2x=1/3×1/4

1/2x=1/12

x=1/6

3.3/4x - 2 =1.6

3/4x=3.6

x=4.8

4.(0.4+x)×6 = 5.4

0.4+x=0.9

x=0.5