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3 years ago

What is the value of x in the equation 3x − 31 = 76

1 answer:

3 0

Add 31 to both sides.

3x−31+31=76+31

3x=107

Divide both sides by 3.

‌3x/3‌=‌107/3
‌x=‌ $\frac{107}{3}$

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ICE Princess25 [194]

The equation (form) is: $\frac{2}{3}x + 4 = 7$

The solution of the equation is: $x = \frac{9}{2}$

Explanation:

First, let's call the number we are going to solve for "x".

Then two thirds of this number can be written as:

$\frac{2}{3}x$

Then "plus 4" means add 4 we get:

$\frac{2}{3}x + 4$

"is 7" means that the above expression is equal to 7 (as follows):

$\frac{2}{3}x + 4 = 7$

The solution of the above equation is:

$\frac{2}{3}x + 4 = 7 \\ \frac{2}{3}x = 3 \\ x = \frac{9}{2}$

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Step-by-step explanation:

$f(3) = {(3)}^{2} + 3(3) - 7 = 9 + 9 - 7 \\ = 18 - 7 = 11$

$g(3) = 5(3) - 3 = 15 - 3 = 12$

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