1. 1 / 4 x + 3 = 5.42, (1-25%) x = 1.53, 60% x-3 = 9.6

1. 1 / 4 x + 3 = 5.4
Double four on both sides
x+3=21.6
x=21.6-3
x=18.6
2、(1-25%)x=1.5
0.75x=1.5
x=1.5÷0.75
x=2
3、60%x-3=9.6
0.6x=9.6+3
0.6x=9.9
x=9.9÷0.6
x=16.5

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