Question

a)4x+2.7=15.21
b)5.(x-1.2)+4=8.35
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Answer 1

a)4x+2.7=15.21

4x=15.21-2.70

4x=12,51/:4

x=3,1275

b) 5×(x-1.2)+4=8.35

5×(x-1.2)=8.35-4

5×(x-1.2)=4.35

x-1.2=4.35:5

x-1.2=0.87

x=1,2+0,87

x=2,07