The = sign
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)
The two sides of an equation are referred to as the "left-hand side" (LHS) and the "right-hand side" (RHS). The correct symbol that separates them is the equals sign (=), indicating that both sides represent the same value or expression.
5a = 22 Divide both sides by 5: a = 4.4
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
To find the value of y in the expression 15y-4 = 41, you need to isolate y. Start by adding 4 to both sides of the equation to get 15y = 45. Then, divide both sides by 15 to solve for y, which equals 3. Therefore, the value of y in the expression 15y-4 when it equals 41 is 3.
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)
The two sides of an equation are referred to as the "left-hand side" (LHS) and the "right-hand side" (RHS). The correct symbol that separates them is the equals sign (=), indicating that both sides represent the same value or expression.
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
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
5x - 3 = 12 Add 3 to both sides: 5x = 15 Divide both sides by 5: x = 3
4a-13 = 19 Add 13 to both sides: 4a = 32 Divide both sides by 4 to find the value of a: a = 8
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.