Question

calcule
A) x + 1 = 2
B) 5 + X = 23
C) 6 + 4x + 2x = 42
D) X + 2x - 4 = 5x + 6
E) X + 15 = 30 - 2x
F) 3x - X + 5 = 18
G) 5x + 5 = 4x - 1
H) 3(x - 1) = 8
I) 2( 4x - 3 ) = 6x - 1
J) 5(2x + 1 ) = 4 ( x- 1 )​

Answer 1

A)

$x + 1 = 2 \\ x=2-1 \\ x=1$

B)

$5 + x = 23 \\ x=23-5 \\ x=18$

C)

$6 + 4x + 2x = 42 \\ 6x=42-6 \\ 6x=36$

$x=\frac{36}{6} \\ x=6$

D)

$x + 2x - 4 = 5x + 6 \\3x-5x=6+4 \\ -2x=10$

$-2x=10\times(-1) \\ 2x=-10 \\ x=-\frac{10}{2} \\ x=-5$

E)

$x+ 15 = 30 - 2x \\ x+2x=30-15 \\ 3x=15$

$x=\frac{15}{3} \\ x=5$

F)

$3x - x + 5 = 18 \\ 2x=18-5 \\ 2x=13 \\ x=\frac{13}{2}$

G)

$5x + 5 = 4x - 1 \\ 5x-4x=-1-5 \\ x=-6$

H)

$3(x - 1) = 8 \\ 3x-3=8 \\ 3x=8+3 \\ 3x=11 \\ x=\frac{11}{3}$

I)

$2( 4x - 3 ) = 6x - 1 \\8x-6=6x-1 \\ 8x-6x=6-1$

$2x=5 \\ x=\frac{5}{2}$

J)

$5(2x + 1 )=4(x-1) \\ 10x+5=4x-4 \\ 10x-4x=-5-4$

$6x=-9 \\ x=-\frac{9}{6} \\ x=-\frac{3}{2}$