Question

Which of the following numbers can be obtained by making a positive change of 7 to 69?Which of the following numbers can be obtained by making a positive change of 7 to 69?

Answer 1

Step-by-step explanation:

Let them be x and y respectively

so given

\begin{gathered}x - y = 69 \\ \end{gathered}x−y=69

and

\begin{gathered} \frac{x}{y} = 4 \\ so \: x = 4y(cross \: multiplication)\end{gathered}yx=4sox=4y(crossmultiplication)

so we can write

x - y = 69x−y=69

as

\begin{gathered}4y - y = 69 \\ 3y = 69 \\ y = 69 \div 3 \\ y = 23\end{gathered}4y−y=693y=69y=69÷3y=23

now y is 23

so putting in any equation will give the value of x

so

\begin{gathered}x - y = 69 \\ = > x - 23 = 69 \\ x = 69 + 23 \\ x = 92\end{gathered}x−y=69=>x−23=69x=69+23x=92

x is 92 and y is