Question

1) 3x +4 = x + 2

2) x +4 = 16

3) x +1 = 9 + 4

Answer 1

Oi !

Teremos :

1 ) 3X + 4 = X + 2

3X - X = 2 - 4

2X = - 2

X = - 2 / 2

X = - 1

S ( - 1 )

2 ) X + 4 = 16

X = 16 - 4

X = 12

S ( 12 )

3 ) X + 1 = 9 + 4

X = 9 + 4 - 1

X = 13 - 1

X = 12

S ( 12 )