Question

4.5=2X 97-2X=34.2 18X-5X =78 zhe这几题怎么解?

Answer 1

4.5=2X

X=4.5/2=2.25

97-2X=34.2

97-34.2=2X

62.8=2X

X=31.4

18X-5X=78

13X=78

X=6

4.5-2X=11.5

4.5-11.5=2X

-7=2X

X=-3.5