SOLUTION: find the value of each variable. 3a-5, b+3, 2a, 2b-1

Question 268700: find the value of each variable. 3a-5, b+3, 2a, 2b-1
Answer by persian52(161) (Show Source): You can put this solution on YOUR website!
3a-5_a=2a

First find the solution to the equation.
a=2a

Move all terms not containing a to the right-hand side of the equation.
-a=0

Multiply -a by -1 to get a.
a=0*-1

Solve the equation before evaluating.
a=0

Now that values have been found for each variable, the expression can be evaluated.
3a-5_a=0

Replace the variable a with 0 in the expression.
3(0)-5

Multiply 3 by each term inside the parentheses.
0-5

Combine all similar expressions.
Answer: -5
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b+3_b=2b-1

First find the solution to the equation.
b=2b-1

Move all terms not containing b to the right-hand side of the equation.
-b=-1

Multiply -b by -1 to get b.
b=-1*-1

Solve the equation before evaluating.
b=1

Now that values have been found for each variable, the expression can be evaluated.
b+3_b=1

Replace the variable b with 1 in the expression.
(1)+3

Remove the parentheses around the expression 1.
1+3

Add 3 to 1 to get 4.
Answer: 4
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