solve this word problem (simplify)

Question

Jose has scores of 87, 89, and 92 on his first three weekly algebra exams. What score must he get on the final exam to have an average of 90 or better for the four exams. ( assume that all four exams are weighted equally)? please help and please show work so I understand it. Thank you!

Answer 1

87+89+92+x=90 Multiply by 4 the values by 4 268x=360 X=92 He must score 92 or better to average 90 or better