Question
Solve the equation
x=−1
Evaluate
21−3x=65
Move the constant to the right-hand side and change its sign
−3x=65−21
Subtract the numbers
More Steps

Evaluate
65−21
Reduce fractions to a common denominator
65−2×33
Multiply the numbers
65−63
Write all numerators above the common denominator
65−3
Subtract the numbers
62
Cancel out the common factor 2
31
−3x=31
Rewrite the expression
3−x=31
Multiply both sides of the equation by 3
3−x×3=31×3
Multiply the terms
−x=1
Solution
x=−1
Show Solution

Rewrite the equation
x=−1
Evaluate
21−3x=65
Rewrite the expression
More Steps

Evaluate
−3x
Use b−a=−ba=−ba to rewrite the fraction
3−x
Reduce the fraction
−31x
21−31x=65
Multiply both sides of the equation by LCD
3−2x=5
Move the constant to the right side
−2x=2
Multiply both sides
2x=−2
Solution
x=−1
Show Solution
