Question

Resolva as inequações do 1° grau

A)5y<45=

B)2a>22

C)7x<49

D)3a>21

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Answer 1

Resposta:

$a)5y<45\\\\\frac{5y}{5} <\frac{45}{5} \\\\y<9$

$b)2a>22\\\\\frac{2a}{2} >\frac{22}{2} \\\\a>11$

$c)7x<49\\\\\frac{7x}{7} <\frac{49}{7} \\\\x<7$

$d)3a>21\\\\\frac{3a}{3} >\frac{21}{3} \\\\a>7$