Complete the proof If 7a + b = 24 and b = 3, then a = 3
7a + b = 24
7a + 3 = 24 {substituted 3 in for b}
7a = 21 {subtracted 3 from each side}
a = 3 {divided each side by 7}
Not written as a proof, but it is proof.
Ask the House
7a + 3 = 24 {substituted 3 in for b}
7a = 21 {subtracted 3 from each side}
a = 3 {divided each side by 7}
Not written as a proof, but it is proof.
Ask the House
