5x+2x=84
7x=84
x=84:7
x=12
12x-4x=3248
8x=3248
x=3248:8
x=406
17y-y=1616
16y=1616
y=1616:16
y=101
y+19y=4040
20y=4040
y=4040:20
y=202
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Answers & Comments
5x+2x=84
7x=84
x=84:7
x=12
12x-4x=3248
8x=3248
x=3248:8
x=406
17y-y=1616
16y=1616
y=1616:16
y=101
y+19y=4040
20y=4040
y=4040:20
y=202