Question

5resolva em R as equações a seguir
a)5×-3x = 30
b)2x +3 = 17
c)4x + 10 =45 - 3x
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Answer 1

Resposta:

$5x-3x = 30\\\\\frac{5\left(-3\right)x}{-15}=\frac{30}{-15}\\\\x=-2$

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$2x +3 = 17\\\\2x+3-3=17-3\\\\2x=14\\\\\frac{2x}{2}=\frac{14}{2}\\\\x=7$

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$4x + 10 =45 - 3x\\\\x+10-10=45-3x-10\\\\4x=-3x+35\\\\4x+3x=-3x+35+3x\\\\7x=35\\\\\frac{7x}{7}=\frac{35}{7}\\\\x=5$