Solve 4x+7+5x+8 - ScanMath

Question

Simplify the expression

9 x + 15

Evaluate

4 x + 7 + 5 x + 8

Add the terms

More Steps

Evaluate

4 x + 5 x

Collect like terms by calculating the sum or difference of their coefficients

(4 + 5) x

Add the numbers

9 x

9 x + 7 + 8

Solution

9 x + 15

Show Solution

3 (3 x + 5)

Evaluate

4 x + 7 + 5 x + 8

Add the terms

More Steps

Evaluate

4 x + 5 x

Collect like terms by calculating the sum or difference of their coefficients

(4 + 5) x

Add the numbers

9 x

9 x + 7 + 8

Add the numbers

9 x + 15

Solution

3 (3 x + 5)

Show Solution

x = - \frac{5}{3}

Alternative Form

x = - 1. \dot{6}

Evaluate

4 x + 7 + 5 x + 8

To find the roots of the expression,set the expression equal to 0

4 x + 7 + 5 x + 8 = 0

Add the terms

More Steps

Evaluate

4 x + 7 + 5 x + 8

Add the terms

More Steps

Evaluate

4 x + 5 x

Collect like terms by calculating the sum or difference of their coefficients

(4 + 5) x

Add the numbers

9 x

9 x + 7 + 8

Add the numbers

9 x + 15

9 x + 15 = 0

Move the constant to the right-hand side and change its sign

9 x = 0 - 15

Removing 0 doesn't change the value,so remove it from the expression

9 x = - 15

Divide both sides

\frac{9 x}{9} = \frac{- 15}{9}

Divide the numbers

x = \frac{- 15}{9}

Solution

More Steps

Evaluate

\frac{- 15}{9}

Cancel out the common factor 3

\frac{- 5}{3}

Use \frac{- a}{b} = \frac{a}{- b} = - \frac{a}{b} to rewrite the fraction

- \frac{5}{3}

x = - \frac{5}{3}

Alternative Form

x = - 1. \dot{6}

Show Solution