Question

12.5+6x=13.1 x－二十分之三x＝18.7 2x＋1.5x＝17.5 x－二分之一x＝4

Answer 1

12.5+6x=13.1

6x=13.1-12.5

6x=0.6

x=0.1

x-(3/20)x=18.7

(20/20)x-(3/20)x=18.7

(17/20)x=18.7

x=18.7÷17/20

x=18.7×20/17

x=22

2x+1.5x=17.5

3.5x=17.5

x=5

x-(1/2)x=4

(2/2)x-(1/2)x=4

(1/2)x=4

x=4÷1/2

x=8