-2
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7-c=9
subtract 7 from both sides: -c = 2
multiply both sides by -1 (or change signs): c = -2
Add 9 to both sides: 7c - 14 Divide both sides by seven: c = 2
Its evaluation is: (4*5)+(7*3) = 41
7C MINUS bracket open c plus 2 bracket close equals 7c minus c minus 2 equals 6c minus 2
36-4c-3c=22 -7c=22-36 -7c=-14 therefore c=2
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