150*х*3=1800, 12090-х=3090:30, а:30=768+987, ( х+240 ) * 3 - 360=540, 876+у+9869=78000 (...

Question

150*х*3=1800, 12090-х=3090:30, а:30=768+987, ( х+240 ) * 3 - 360=540, 876+у+9869=78000 ( решите уровнения )

Answer 1

150×x×3=1800
x×3=1800÷150
x×3=12
x=12÷3
x=4

12090-x=103
x=12090-103
x=11987

a÷30=1755
a=1755×30
a=52650

(x+240)×3=540+360
3x+720=900
3x=900-720
3x=180
x=180÷3
x=60

876+y+9869=78000
10745+y=78000
y=78000-10745
y=67255