1( 12+ b=72:2 2) (x+20):5=6 3)a:10=960:2 4)2400:(c-12)=10

Question

1( 12+ b=72:2
2) (x+20):5=6
3)a:10=960:2
4)2400:(c-12)=10

Answer 1

1) 12+b=36 | b=3

2) x/5 +4=6 x/5=2 | x=10

3) a/10=480 | a=4800

4) c-12=240 c=252

Answer 2

1)б=12
2)х=10
3)а=4800
4)с=360

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