Q: What its the expression that have the same value on both sides of the equals sign?

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You can:* Add the same expression to both sides of an equation * Subtract the same expression from both sides * Multiply the same expression (must not be zero) to both sides * Divide both sides by the same expression (must not be zero)

5a = 22 Divide both sides by 5: a = 4.4

Double verticle lines surrounding an expression means to take the absolute value of the expression. The absolute value of an expression is the expression if it is positive, and the negative of the expression if it is negative, i.e. the unsigned distance from zero. Analytically, in order to process the expression, the absolute value of an expression is also the square root of the square of the expression.

12a = 48 Divide both sides by 12 to find the value of a: a = 4

4a-13 = 19 Add 13 to both sides: 4a = 32 Divide both sides by 4 to find the value of a: a = 8

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you test it by giving the letters a value say if X equals 5 and Y equals 7 then you calculate both expressions with that value. If both answers are the same, then the simplified expression is correct, or an equivalent.

You can:* Add the same expression to both sides of an equation * Subtract the same expression from both sides * Multiply the same expression (must not be zero) to both sides * Divide both sides by the same expression (must not be zero)

3a=1divide both sides by 3a=1/3

5a = 22 Divide both sides by 5: a = 4.4

26 - x = xAdd 'x' to both sides.26 = 2xDivide both sides by 2.13 = x

Double verticle lines surrounding an expression means to take the absolute value of the expression. The absolute value of an expression is the expression if it is positive, and the negative of the expression if it is negative, i.e. the unsigned distance from zero. Analytically, in order to process the expression, the absolute value of an expression is also the square root of the square of the expression.

12a = 48 Divide both sides by 12 to find the value of a: a = 4

8x + 5 = 25(- 5 from both sides)8x = 20(divide both sides by 8)x = 2.5

4a-13 = 19 Add 13 to both sides: 4a = 32 Divide both sides by 4 to find the value of a: a = 8

5x - 3 = 12 Add 3 to both sides: 5x = 15 Divide both sides by 5: x = 3

The statement "equals" means that they are equal. If the word "equals" and its symbol " = " are a true statement, then the two sides are truly equal in every way.

x2 = 49 Square root both sides to find the value of x:- x = 7