Question

23/25 which equation has x=9 as a solution? x + 7 = 26 5x = 45 4 + x = 12 2x = 20

Explanation:

Step1: Check the first equation

Substitute \(x = 9\) into \(x+7=26\). We get \(9 + 7=16
eq26\).

Step2: Check the second equation

Substitute \(x = 9\) into \(5x = 45\). We have \(5\times9=45\), which is true.

Step3: Check the third equation

Substitute \(x = 9\) into \(4 + x=12\). We get \(4+9 = 13
eq12\).

Step4: Check the fourth equation

Substitute \(x = 9\) into \(2x=20\). We have \(2\times9 = 18
eq20\).

Answer:

\(5x = 45\)