👤
Andrei554522244
a fost răspuns

4(x-5)+3(3x-5)=2(2x+5)-9​

Răspuns :

Ioana16082
se da factor comun:
(x-5)(4+3)=2•2x+2•5-9
(x-5)•7=4x+10-9
(x-5)•7=4x+1
1x-5-4x=1-7
1x-8x=-6
-7x=-6
x=-6:(-7)
x=-42

4(x-5)+3(3x-5)=2(2x+5)-9

4×-20+9×-15=4×+10-9

-20+9×-15=10-9

-35+9×=1

9x=35+1

9×=36

×=4

Alte intrebari