Question

2（x/5）=2.5 7.5+25x=10 34x-18*3=24.2 求x等于多少?

Answer 1

2(x/5)=2.5

x/5=2.5/2=1.25

x=1.25*5=6.25

7.5+25x=10

25x=10-7.5=2.5

x=2.5/25=0.1

34x-18*3=24.2

34x=24.2+18*3=78.2

x=78.2/34=2.3