maga2019
29.08.2019 •
Mathematics
Solve the system by substitution. check your solution.
0.5x+0.25y=36
y+18=16x
a.
(36, 72)
c.
(49, 81)
b.
(9, 126)
d.
(21, 9)
Solved
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Ответ:
y + 18 = 16x
=>y=16x-18
0.5x + 0.25y = 36 (multiply both sides by 4)
=>2x+y = 144
Substitute y=16x-8
=>2x+16x-8=144
=>18x=152
=>x=152/18=9
y=16x-18
=>y=16(9)-18
=>y=144-18=126
x=9 and y=126
Ответ:
Me and my Brother!
Step-by-step explanation: Have a blessed day!