-7(x + 9) = 9(x - 5) - 14x Show work to prove your answer!

Solve for x!

−7(x+9)=9(x−5)−14x

(−7)(x)+(−7)(9)=(9)(x)+(9)(−5)+−14x(Distribute)

−7x+−63=9x+−45+−14x

−7x−63=(9x+−14x)+(−45)(Combine Like Terms)

−7x−63=−5x+−45

−7x−63=−5x−45

Step 2: Add 5x to both sides.

−7x−63+5x=−5x−45+5x

−2x−63=−45

Step 3: Add 63 to both sides.

−2x−63+63=−45+63

−2x=18

Step 4: Divide both sides by -2.

−2x

−2

=

18

−2

x=−9

x=−9

Step-by-step explanation:  hope that helped :)

x = -9  I used

Step 1: Simplify both sides of the equation.

−7(x+9)=9(x−5)−14x

(−7)(x)+(−7)(9)=(9)(x)+(9)(−5)+−14x(Distribute)

−7x+−63=9x+−45+−14x

−7x−63=(9x+−14x)+(−45)(Combine Like Terms)

−7x−63=−5x+−45

−7x−63=−5x−45

Step 2: Add 5x to both sides.

−7x−63+5x=−5x−45+5x

−2x−63=−45

Step 3: Add 63 to both sides.

−2x−63+63=−45+63

−2x=18

Step 4: Divide both sides by -2.

−2x

−2

=

18

−2

x=−9

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.