Pre-Algebra Examples

$16 + 8 x - 25 = - 7 (3 - x) + 3 x$

Step 1

Subtract $25$ from $16$ .

$8 x - 9 = - 7 (3 - x) + 3 x$

Step 2

Simplify $- 7 (3 - x) + 3 x$ .

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Step 2.1

Simplify each term.

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Step 2.1.1

Apply the distributive property.

$8 x - 9 = - 7 \cdot 3 - 7 (- x) + 3 x$

Step 2.1.2

Multiply $- 7$ by $3$ .

$8 x - 9 = - 21 - 7 (- x) + 3 x$

Step 2.1.3

Multiply $- 1$ by $- 7$ .

$8 x - 9 = - 21 + 7 x + 3 x$

Step 2.2

Add $7 x$ and $3 x$ .

$8 x - 9 = - 21 + 10 x$

Step 3

Graph each side of the equation. The solution is the x-value of the point of intersection.

$x = 6$

Step 4