Solution - Linear equations with one unknown
r=-9
Step by Step Solution
Rearrange:
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
7*r-(7*(2*r+9))=0
Step by step solution :
Step 1 :
Equation at the end of step 1 :
7r - 7 • (2r + 9) = 0
Step 2 :
Step 3 :
Pulling out like terms :
3.1 Pull out like factors :
-7r - 63 = -7 • (r + 9)
Equation at the end of step 3 :
-7 • (r + 9) = 0
Step 4 :
Equations which are never true :
4.1 Solve : -7 = 0
This equation has no solution.
A a non-zero constant never equals zero.
Solving a Single Variable Equation :
4.2 Solve : r+9 = 0
Subtract 9 from both sides of the equation :
r = -9
One solution was found :
r = -9How did we do?
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