Explicación paso a paso:
a) Resolver
10x + 10 = 2x -6
10x -2x = -6 + 10
+8x = +4
x = 4/8
x= 0,5
a) Comprobación
10(0,5)-10= 2(0,5)-6
5-10 = 1-6
-5 = -5
b) Resolver
3x +10 = 10x -2
3x - 10x = -2 -10
-7x =-12
x = -12/ -7
x= 1.7
b) Comprobación
3(1.7)+ 10 = 10(1.7)-2
5,1 +10 = 17-2
15,1 = 15