Question

Resuelve
a)3x+4=X
b)2x+20=4x
c)7x-15=4x
d)10x-30=20x

Answer 1

a)3x+4=x
2x = -4
x = -2
b)2x+20=4x
20 = 2x
x = 10
c)7x-15=4x
3x = 15
x = 5
d)10x-30=20x
x-3=2x
x=-3

Answer 2

a) 3×+4=× 2x=-4 X=-2 b)2x+20=4x 20=2x X=20/2 X=10