Question

1. (a + 81 :9)×5=295 2.(b×4+20):2=54 piteti sami raspundeti la amândouă va rog

Answer 1

(a+81:9)×5=295
(a+9)×5=295
a+9=295:5
a+9=59
a=59-9
a=50

Proba :
(50+81:9)×5=295
(50+9)×5=295
59×5=295
295=295




(b×4+20):2=54
b×4+20=54×2
b×4+20=108
b×4=108-20
b×4=88
a=88:4
a=22

Proba :
(22×4+20):2=54
(88+20):2=54
108:2=54
54=54

Answer 2

a)

(a+81:9)×5=295

(a+9×5)=295

5(a+9)=295

a+9=295:5=59

a=59-9=50

b)

(b×4+20):2=54

4b+20:2=54

4(b+5):2=54

2(b+5)=54

b+5=54:2=27

b=27-5=22