Question

帮我解几道方程、、8x-4（10-x）=44 60x+(100-x)*65=100*63 30x-20(180-x)=5

Answer 1

8x-4（10-x）=44

8x-40+4x）=44

12x=84

x=7

60x+(100-x)*65=100*63

60x+6500-65x=6300

5x=200

x=40

30x-20(180-x)=5250

50x=5250+3600

x=177

0.4x+0.2(99-x)=34

0.2x=14.2

x=71

4x+3(x+8)=164

7x=140

x=20

(x+6)*4+(x+x+6)*10=660

4x+24+20x+60=660

24x=576

x=24