1) 16 - 8x = 0
⇔ -8x = -16
⇔ x = 2
2) 7x + 14 =0
⇔ 7x = -14
⇔ x = -2
3) 5 - 2x = 0
⇔ - 2x = -5
⇔ x = $\frac{5}{2}$
4) 3x - 5 = 7
⇔ 3x = 12
⇔ x = 4
5) 8 - 3x =6
⇔ - 3x = -2
⇔ x = $\frac{2}{3}$
6) 8 = 11x +6
⇔ -11x = -2
⇔ x= $\frac{2 }{11}$
7) -9 + 2x =0
⇔ -9 = -2x
⇔ x = $\frac{9}{2}$
8) 7x + 2 = 0
⇔ 7x = -2
⇔ x = $\frac{-2}{7}$
9) 5x -6 = 6 + 2x
⇔ 3x = 12
⇔ x = 4
10) 10 + 2x = 3x -7
⇔ -x = -17
⇔ x = 17
11) 5x - 3 = 16 - 8x
⇔ 13x = 19
⇔ x = $\frac{19 }{13 }$
12) -7 -5x = 8 + 9x
⇔ -14x = 15
⇔ x = - $\frac{15}{14}$
13) 18 - 5x = 7 + 3x
⇔ -8x = -11
⇔ x = $\frac{11}{8}$
14) 9 - 7x = - 4x +3
⇔ -3x = -6
⇔ x = 2
15) 11 -11x = 21 -5x
⇔ -6x = 10
⇔ x = - $\frac{10}{6 }$
16) 2(- 7 + 3x ) = 5 - ( x+2)
⇔ -14 + 6x = 5 - x - 2
⇔ 7x = 17
⇔ x= $\frac{17}{7}$
17) 5( 8 + 3x ) + 2(3x -8) =0
⇔ 40 + 15x + 6x -16 =0
⇔ 21x = -24
⇔ x = - $\frac{24}{21}$
18) 3(2x -1) - 3x +1 =0
⇔ 6x -3 -3x +1 = 0
⇔ 3x = 2
⇔ x = $\frac{2}{3}$
19) -4 ( x -3) = 6x + ( x-3)
⇔ -4x + 12 = 6x + x -3
⇔ -11x = -15
⇔ x = $\frac{15}{11}$
20) -5 -(x+3) = 2 - 5x
⇔ -5 -x -3 = 2 - 5x
⇔ 4x = 10
⇔ x = $\frac{10}{4}$ = $\frac{5}{2}$
