1) x + 4/5 = 11
Isolate the x. Subtract 4/5 from both sides
x + 4/5 (-4/5) = 11 (-4/5)
x = 11 - 4/5
x = 10 1/5
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x - 3/7 = 4
Isolate the x. Add 3/7 to both sides
x - 3/7 (+3/7) = 4 (+3/7)
x = 4 + 3/7
x = 4 3/7
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x + 3/5 = 5/7
Subtract 3/5 from both sides
x + 3/5 (-3/5) = 5/7 (-3/5)
x = 5/7 - 3/5
Find common denominators. Remember that what you multiply to the denominator, you multiply to the numerator as well
(5/7)(5/5) = 25/35
(3/5)(7/7) = 21/35
x = 25/35 - 21/35
x = 4/35
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Answers are bolded
hope this helps
