Respuesta :
150 + 225(3.5) + x = 2000
150 + 787.50 + x = 2000
937.50 + x = 2000
x = 2000 - 937.50
x = 1062.50 ...the food budget
1062.50 / 225 = 4.72 per student for food <==
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j = r + 10
s = 2j....... 2(r + 10)....2r + 20
s + r + j = 130
(2r + 20) + r + (r + 10) = 130
4r + 30 = 130
4r = 130 - 30
4r = 100
r = 100/4
r = 25 <=== Rosana
j = r + 10
j = 25 + 10
j = 35 <=== Juliet
s = 2r + 20
s = 2(25) + 20
s = 50 + 20
s = 70 <=== Santiago
150 + 787.50 + x = 2000
937.50 + x = 2000
x = 2000 - 937.50
x = 1062.50 ...the food budget
1062.50 / 225 = 4.72 per student for food <==
=======================
j = r + 10
s = 2j....... 2(r + 10)....2r + 20
s + r + j = 130
(2r + 20) + r + (r + 10) = 130
4r + 30 = 130
4r = 130 - 30
4r = 100
r = 100/4
r = 25 <=== Rosana
j = r + 10
j = 25 + 10
j = 35 <=== Juliet
s = 2r + 20
s = 2(25) + 20
s = 50 + 20
s = 70 <=== Santiago
(part one.) Step 1: 2,000-150=1,850 Step 2: 225x3.50=? Find out the answer to this problem then,do $1.850 minus the answer to this problem Step 3:Then the answer you got after you had minus,is the answer to this question or the answer to how much the student council could spend per student in food I don't get what your asking for part two tho please tell me more