a) x-2 = -63:9
x-2 = -7
x = -7+2
x = -5
b) 5x+15 = 10x-10
5x-10x = -10-15
-5x = -25
x = 25:5 = 5
c) 8x+2 = 10x-14
8x-10x = -14-2
-2x = -16
x = 8
d) -2x+10 = -24x-16+56
-2x+24x = 40-10
22x = 30
x = 30/22 = 15/11
e) 1-4*[-5x+10] = 21
-4*[-5x+10] = 21-1
-5x+10 = 20:4
-5x = 5-10
-5x = -5
x = 1
f) 5x-10-7x-21+35 = 0
-2x+4 = 0
-2x = -4
x = 2
g) Produsul a doua paranteze egalate cu 0, va rezulta doua solutii
x+3 = 0⇒ x = -3
x-7 = 0 ⇒ x = 7
h) -2x+6 = 0 ⇒ -2x = -6 ⇒ x = 3
x+3 = 0 ⇒ x = -3
