Arthur writes the equation a=10b−7 . He wants to rewrite it in terms of b . In Arthur’s first step, what value should he add to both sides of the equation?(1 point)

Answer 1

To rewrite the equation \( a = 10b - 7 \) in terms of \( b \), Arthur needs to isolate \( b \) on one side of the equation.

First, he should move \( -7 \) to the other side. To do this, he should add \( 7 \) to both sides of the equation. This gives:

\[ a + 7 = 10b \]

So, the value that Arthur should add to both sides of the equation is 7.