Question

Properties of Equality Addition Property of Equality Subtraction Property of Equality For real numbers a, b, and c, if a = b, For real numbers o, b, and c, if a = b, then a +C= then a-c= Multiplication Property of Equality Division Property of Equality For real numbers a, b, andc, if a = b and For real numbers o, b, and c, ifo =b and cz0, C0, then a c then = C

Answer 1

y = -9

Step-by-step explanation:

we simplify the expression to get y: 2/3 y + 15 = 9

`\begin{gathered} (2)/(3)y\text{ + 15 = 9} \\ \text{Subtract both sides }by\text{ 15} \\ (2)/(3)y\text{ + 15 -15 = 9 - 15} \\ \text{This is a subtraction property of equality} \\ (2)/(3)y\text{ = -}6 \end{gathered}`
`\begin{gathered} \text{Multiply both sides by the inverse of }the\text{ coefficient of y} \\ \text{coefficent of y = 2/3 } \\ inverse\text{ of the }coefficent\text{ of y = 2/3} \\ (2)/(3)y*(3)/(2)\text{ = -6}*\text{ }(3)/(2) \\ it\text{ is a Multiplication property of equality: }a* c\text{ = b}*\text{ c} \\ y\text{ = -18/2} \\ \end{gathered}`
`y\text{ = -9 }`