Question

Please help and explain

Answer 1

Answer:

3x-1+x+7=54

4x+6=54

4x=48

x=12

Answer 2

Answer:

$x = 12$

Step-by-step explanation:

$3x - 1 + x + 7 = 54$

$4x + 6 = 54$

$4x + 6 - 6 = 54 - 6$

$4x = 48$

$\frac{4x}{4} = \frac{48}{4}$

$x = 12$

$3(12) - 1 + (12) + 7 = 54$

$36 - 1 + 12 + 7 = 54$

$35 + 12 + 7 = 54$

$35 + 19 = 54$

$54 = 54$