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 can first isolate the term involving \( b \). The first step would involve eliminating the \(-7\) on the right side of the equation.

To do this, he should add \( 7 \) to both sides of the equation.

Adding \( 7 \) gives:

\[ a + 7 = 10b \]

So, in Arthur's first step, he should add \( 7 \) to both sides of the equation.