The value of x from the equation 3x + 4 = 31 and x + 4 = 13 is 9.
How to solve equation?
3x + 4 = 31
x + 4 = 13
From equation (2)
x + 4 = 13
subtract 4 from both sides
x = 13 - 4
x = 9
Substitute x = 9 into (1)
3x + 4 = 31
3(9) + 4 = 31
27 + 4 = 31
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