Răspuns :
a) 3(2x-11)=2x-41
6x-33=2x-41
6x-2x= -41+33
4x= -8
x= -8:4
x= -2
b) 11x-1=4(7x+5)
11x-1=28x+20
11x-28x=20+1
-17x=21
x=21/(-17)
x= -21/17
c) 5(1-4x)= -7-16x
5-20x= -7-16x
-20x+16x= -7-5
-4x= -12
x=(-12):(-4)
x=3
d) 2(5x-4)=7x-20
10x-8=7x-20
10x-7x= -20+8
3x= -12
x= -12:3
x= -4
e) 20x+13=6(5x-7)
20x+13=30x-42
20x-30x= -42-13
-10x= -55
x=(-55)/(-10)
x=55/10
x=11/2
f) 5(8-3x)=20x-10
40-15x=20x-10
-15x-20x= -10-40
-35x= -50
x= (-50)/(-35)
x=50/35
x=10/
Baftă! (❁´◡`❁)
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Am sărit peste una
2(5x-4)=7x-20 ⇒ 10x-8=7x-20 ⇒ 10x-7x=-20+8 ⇒ 3x=-12 ⇒ x=-4