An equation demonstrates the equality of two expressions. x2+12x+13 is only one expression.
For example,
x+y : expression, not equation
x+5 = 3 : equation
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3 - x = 12x - 1 Add x to both sides of the equation: 3 = 13x - 1 Add 1 to both sides of the equation: 4 = 13x Divide both sides of the equation by 13: 4/13 = X
5
To solve the equation 1 + 2x + 13 = 9, you first need to simplify by combining like terms. Subtract 1 and 13 from both sides of the equation to isolate the variable term. This gives you 2x = -5. Finally, divide by 2 on both sides to solve for x, which gives you x = -5/2 or -2.5.
Set up the equation and solve: x + 5 = -13 (next subtract 5 from each side of the equation to solve for x) x = -18
Set up the equation and solve: 13 = 7 + s (next subtract 7 from each side of the equation to solve for s) 6 = s