2x+5x=16, 5x+2y=40 x+y=?
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Since 2x+5x=16
7x=16
x=16/7
Therefore,
5×16/7+2y=40
80/7+2y=40
2y=40-80/7
2y=40×7/7-80/7
2y=280/7-80/7
2y=200/7
y=200/14
y=100/7
Therefore,
x+y=16/7+100/7
=116/7
=16.58
HOPE IT HELPS YOU!!!!!
7x=16
x=16/7
Therefore,
5×16/7+2y=40
80/7+2y=40
2y=40-80/7
2y=40×7/7-80/7
2y=280/7-80/7
2y=200/7
y=200/14
y=100/7
Therefore,
x+y=16/7+100/7
=116/7
=16.58
HOPE IT HELPS YOU!!!!!
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