Question

Rezolvati ecuatiile:
2x+6=5
6-3x=4
x+1=2(x+2)
(x-1)*3 = x+2
dau coroana si 20 puncte

Answer 1

2x+6=5
2x=5-6
2x= -1
x = -1/2

6-3x=4
6-4=3x
2=3x
x=2/3

x+1=2(x+2)
x+1=2x+4
1-4=2x-x
-3=x

(x-1)*3 = x+2
3x-3=x+2
3x-x=2+3
2x=5
x=5/2

Answer 2

2X+6 = 5
2X = 5-6
2X = - 1
X = - 1/2
V: 2×(-1/2)+6 = -1 +6 = 5

6-3X = 4
-3X = 4-6
-3X = - 2 (-):(-) = (+)
X = 2/3
V: 6-3×2/3 = 6-2 = 4

X + 1 = 2(X + 2)
X + 1 = 2X+4
2X-X = 1-4
X = - 3
V: - 3 + 1 = 2(-3+2) => -2 = -2

(X-1)×3 = X+2
3X-3 = X + 2
3X -X = 2 + 3
2X = 5
X = 5/2
V: (5/2-1)×3 = 5/2+2 => 3/2×3 = 9/2 => 9/2 = 9/2