Question

rezolvati va rog frummmmooosss!!!

Answer 1

3.
a)5(2x-1)=15
10x-5=15
10x=15+5
10x=20
x=20/10
x=2
b)3(4x+5)=39
12x+15=39
12x=39-15
12x=24
x=24/12
x=2
c)6(3x+9)=-72
18x+54=-72
18x=-72-54
18x=-126
x=-126/18
x=-7
d)8(5x+8)=-96
40x+64=-96
40x=-96-64
40x=-160
x=-160/40
x=-4
e)-9(6x+4)=180
-54x-36=180
-54x=180+36
-54x=216/(-1)
54x=-216
x=-216/54
x=-4
f)-12(7x-15)=-156
-84x+180=-156
-84x=-156-180
-84x=-336/(-1)
84x=336
x=336/84
x=4
g)10(-8x+7)=-170
-80x+70=-170
-80x=-170-70
-80x=-240/(-1)
80x=240
x=240/80
x=3
h)-15(-10x+19)=315
150x-285=315
150x=315+285
150x=600
x=600/150
x=4
i)-20(-9x-11)=-500
180x+220=-500
180x=-500-220
180x=-720
x=-720/180
x=-4
j)-25(14x+70)=0
-350x-1750=0
-350x=1750/(-1)
350x=-1750
x=1750/350
x=5

sper ca te-am ajutat