Math  /  Algebra

QuestionMake xx the subject of x9=rx-9=r

Studdy Solution

STEP 1

1. The equation x9=r x - 9 = r is a linear equation.
2. We need to solve for x x in terms of r r .
3. The equation involves basic algebraic operations, specifically addition.

STEP 2

1. Understand the structure of the equation.
2. Isolate the variable x x by performing algebraic operations.

STEP 3

The equation x9=r x - 9 = r indicates that x x is reduced by 9 to yield r r .

STEP 4

To isolate x x , we need to eliminate the 9-9 from the left side of the equation. We do this by adding 9 to both sides:
x9+9=r+9 x - 9 + 9 = r + 9

STEP 5

Simplify both sides of the equation:
x=r+9 x = r + 9
Now, x x is expressed in terms of r r .

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