Algebra
Calculus
Trigonometry
Matrix
Question
Simplify the expression
2x−27
Evaluate
2x−21−3
Solution
More Steps
Evaluate
−21−3
Reduce fractions to a common denominator
−21−23×2
Write all numerators above the common denominator
2−1−3×2
Multiply the numbers
2−1−6
Subtract the numbers
2−7
Use b−a=−ba=−ba to rewrite the fraction
−27
2x−27
Show Solution
Factor the expression
21(4x−7)
Evaluate
2x−21−3
Subtract the numbers
More Steps
Evaluate
−21−3
Reduce fractions to a common denominator
−21−23×2
Write all numerators above the common denominator
2−1−3×2
Multiply the numbers
2−1−6
Subtract the numbers
2−7
Use b−a=−ba=−ba to rewrite the fraction
−27
2x−27
Solution
21(4x−7)
Show Solution
Find the roots
x=47
Alternative Form
x=1.75
Evaluate
2x−21−3
To find the roots of the expression,set the expression equal to 0
2x−21−3=0
Subtract the numbers
More Steps
Simplify
2x−21−3
Subtract the numbers
More Steps
Evaluate
−21−3
Reduce fractions to a common denominator
−21−23×2
Write all numerators above the common denominator
2−1−3×2
Multiply the numbers
2−1−6
Subtract the numbers
2−7
Use b−a=−ba=−ba to rewrite the fraction
−27
2x−27
2x−27=0
Move the constant to the right-hand side and change its sign
2x=0+27
Add the terms
2x=27
Multiply by the reciprocal
2x×21=27×21
Multiply
x=27×21
Solution
More Steps
Evaluate
27×21
To multiply the fractions,multiply the numerators and denominators separately
2×27
Multiply the numbers
47
x=47
Alternative Form
x=1.75
Show Solution