Question 1002217
j+d= 800
j= d+200 Substitute for j in the equation above:
d+200+d= 800
2d+200=800
2d= 600
d= 300 This is how many miles David drove
Proof:
David drove ...................300
Jess drove 200 more: 300+200= 500
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Total..........................800 We have the right answer