Algebra
Calculus
Trigonometry
Matrix
Question
Simplify the expression
90−x
Evaluate
180−(90−x)−x−x
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
180−90+x−x−x
Subtract the numbers
90+x−x−x
Solution
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Evaluate
x−x−x
Collect like terms by calculating the sum or difference of their coefficients
(1−1−1)x
Subtract the numbers
−x
90−x
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Find the roots
x=90
Evaluate
180−(90−x)−x−x
To find the roots of the expression,set the expression equal to 0
180−(90−x)−x−x=0
Subtract the terms
More Steps
Simplify
180−(90−x)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
180−90+x
Subtract the numbers
90+x
90+x−x−x=0
Calculate the sum or difference
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Simplify
90+x−x
The sum of two opposites equals 0
More Steps
Evaluate
x−x
Collect like terms
(1−1)x
Add the coefficients
0×x
Calculate
0
90+0
Remove 0
90
90−x=0
Move the constant to the right-hand side and change its sign
−x=0−90
Removing 0 doesn't change the value,so remove it from the expression
−x=−90
Solution
x=90
Show Solution