Question 304852
X+Y+Z=175
Y=2X+10
Z=3Y OR 3(2X+10) OR 6X+30
X+(2X+10)+(6X+30)=175
9X+40=175
9X=175-40
9X=135
X=135/9
X=15 ANSWER FOR THE SMALLEST NUMBER.
Y=2*15+10=30+10=40 ANSWER FOR THE MIDDLE NUMBER.
Z=3*40=120 ANSWER FOR THE LARGEST NUMBER.
PROOF:
15+40+120=175
175=175