Question

(a+81:9)×5=295 (b×4+20):2=54

Answer 1

Explicație pas cu pas:

a)(a+81:9)×5 =295

(a+9)×5=295

a+9=295:5

a+9=59

a=59-9

a=50

v:(50+81:9)×5=

(50+9)×5=

59×5=

295

b)(b×4+20):2=54

(b×4+20)=54×2

(b×4+20)=108

b×4=108-20

b×4=88

b=88:4

b=22

v:(22×4+20):2=

( 88+20):2=

108:2=

54

Answer 2

Răspuns:

a=50 b=22

Explicație pas cu pas:

(a+81:9)×5=295

a+9=295:5

a+9=59

a=59-9

a=50

Verificare:

(50+9)×5=59×5=295

b (b×4+20):2=54

b×4+20=54×2

b×4+20=108

b×4=108-20

b×4=88

b=88:4

b=22

Verificare:

(22×4+20):2= (88+20):2=108:2=54