SÓ COLOQUE A CONTA:
A) X + x/5 = 18
B) X - X/7 = - 6/7
C) X/9 + X/4 = 1/2
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A) x + x/5 = 18
(5x + x)/5 = 90/5
6x = 90
x = 15
B)x - x/7 = -6/7
(7x - x) / 7 = -6/7
6x = -6
x = -1
C)x/9 +x/4 = 1/2
(4x + 9x)/ 36 = 18/36
13x = 18
X = 18/13
(5x + x)/5 = 90/5
6x = 90
x = 15
B)x - x/7 = -6/7
(7x - x) / 7 = -6/7
6x = -6
x = -1
C)x/9 +x/4 = 1/2
(4x + 9x)/ 36 = 18/36
13x = 18
X = 18/13
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