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
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