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Nandoryl2
@Nandoryl2
May 2020
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Sabendo que r//s, calcule, o valor de x: aqui está a imagem:
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roni1
Sendo paralelas
7x / 4 + 70 = 3x + 20
70 + 7x .(1/4) = 3x + 20
70 + (7/4).x = 3x + 20
70 + (7/4).x - 3x = 3x + 20 -3x
70 + (-5/4).x = 3x +20 + (-3)x
70 + (-5/4).x = 20
70 + (-5/4).x -70 = 20 - 70
0 + (-5/4) x = 20 -70
(-5/4)x = -50
(-5/4).x ÷ -5/4 = -50÷ -5/4
x = -50÷ -5/4
x = 40
1 votes
Thanks 1
nandoryl2
muito obrigado.
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7x / 4 + 70 = 3x + 20
70 + 7x .(1/4) = 3x + 20
70 + (7/4).x = 3x + 20
70 + (7/4).x - 3x = 3x + 20 -3x
70 + (-5/4).x = 3x +20 + (-3)x
70 + (-5/4).x = 20
70 + (-5/4).x -70 = 20 - 70
0 + (-5/4) x = 20 -70
(-5/4)x = -50
(-5/4).x ÷ -5/4 = -50÷ -5/4
x = -50÷ -5/4
x = 40