2×(x+5)-7=19 ajutatima

Răspuns :

2(x+5)-7= 19
(2•x)+(2•5) -7= 19
2x+10-7=19
2x= 19-10+7
2x= 16
x= 16/2
x= 8

verificare:
2(8+5)-7= 19
2•13-7= 19
26-7= 19
19= 19
2×(x+5)-7=19

2(x+5)=19+7

2(x+5)=26

[tex]x + 5 = \frac{26}{2}=13 [/tex]

x=13-5=8