Question

Which number belongs to the solution set of the equation?

x + 3 = 45
A. 15
B. 48
C. 43
D. 42

Answer 1

D

Step-by-step explana

Answer 2

`\sf \: The \: value \: of \: x \: is \: the \: number \: that \: belongs \: to \: the \: solution \: \\ \sf \: set \: of \: the \: equation. \: So \: we \: need \: to \: find \: x.`

`\sf \: x + 3 = 45 \\ \sf \: x = 45 - 3 \\ \sf \: x = \underline{42}`

Answer ⟶
`\boxed{\bf{D.42}}`