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3 years ago

What is the value of r in the equation -3(4r - 8)=-36

Mathematics

2 answers:

Verizon [17]3 years ago

8 0

Answer:

r=5

Step-by-step explanation:

-3(4r - 8)=-36

The first step is to distribute the -3

-3*4r -3*-8 = -36

-12r +24 = -36

Subtract 24 from each side.

-12r + 24-24 = -36-24

-12r = -60

Divide each side by -12

-12r/-12 = -60/-12

r=5

Marianna [84]3 years ago

3 0

Answer:

r=5

Step-by-step explanation:

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

-3*(4*r-8)-(-36)=0

Step by step solution :

Step 1 :

Step 2 :

Pulling out like terms :

2.1 Pull out like factors :

4r - 8 = 4 • (r - 2)

Equation at the end of step 2 :

(0 - 12 • (r - 2)) - -36 = 0

Step 3 :

Step 4 :

Pulling out like terms :

4.1 Pull out like factors :

60 - 12r = -12 • (r - 5)

Equation at the end of step 4 :

-12 • (r - 5) = 0

Step 5 :

Equations which are never true :

5.1 Solve : -12 = 0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

5.2 Solve : r-5 = 0

Add 5 to both sides of the equation :

r = 5

One solution was found :

r = 5

brainliest pllzz thx god bless

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