math_celebrity Administrator Staff member Jan 7, 2021 #1 56 is the sum of 20 and Donnie's savings. Use the variable d to represent Donnie's savings The sum of 20 and Donnie's savings using d to represent Donnie's savings: 20 + d The word is means equal to, so we set 20 + d equal to 56: 20 + d = 56

56 is the sum of 20 and Donnie's savings. Use the variable d to represent Donnie's savings The sum of 20 and Donnie's savings using d to represent Donnie's savings: 20 + d The word is means equal to, so we set 20 + d equal to 56: 20 + d = 56