Question

3·60-3·[(4·a·4:8+5):5+31]=6·7·5:7

Answer 1

180-3•[(4a•2+5):5+31]=42•5:7
180-3•[(8a+5):5+31]=210:5
=42
3•[(8a+5):5+31]=42/180-42
3•[(8a+5):5+31]=138
(8a+5):5+31=138/:3
(8a+5):5+31=46/-31
(8a+5):5=15/:5
8a+5=3/5-3
8a=2
a=4

Sper ca te am ajutat!

Answer 2

Răspuns:

Explicație pas cu pas:

3*60-3*[(4*a-4/8+5)/5+31]=6*7*5/7

180-3*[(4*a-4/8+5)/5+31]=42*5/7

180-3*[(4*a-4/8+5)/5+31]=210/7

180-3*[(4*a-4/8+5)/5+31]=30

3*[(4*a-4/8+5)/5+31]=180-30=150

(4*a-4/8+5)/5=150-31=119

4*a-4/8+5=119*5=595

4*a-4/8=595-5

4*a-4=590*8

4*a=4720+4

4*a=4724

a=4724/4⇒ a =1181