Algebra
Calculus
Trigonometry
Matrix
Question
Simplify the expression
21a−105
Evaluate
2a÷42−5
Divide the terms
More Steps
Evaluate
2a÷42
Rewrite the expression
422a
Cancel out the common factor 2
21a
21a−5
Reduce fractions to a common denominator
21a−215×21
Write all numerators above the common denominator
21a−5×21
Solution
21a−105
Show Solution
Find the roots
a=105
Evaluate
2a÷42−5
To find the roots of the expression,set the expression equal to 0
2a÷42−5=0
Divide the terms
More Steps
Evaluate
2a÷42
Rewrite the expression
422a
Cancel out the common factor 2
21a
21a−5=0
Subtract the terms
More Steps
Simplify
21a−5
Reduce fractions to a common denominator
21a−215×21
Write all numerators above the common denominator
21a−5×21
Multiply the numbers
21a−105
21a−105=0
Simplify
a−105=0
Move the constant to the right side
a=0+105
Solution
a=105
Show Solution