Question

05. Resolva as equações do 1°grau. a) 7x - 29=13 b) 5x+ 18 = 33 c) -5x = -10x+25 ​

Answer 1

$\large\boxed{\begin{array}{l}\tt a)~\sf 7x-29=13\\\sf 7x=29+13\\\sf 7x=42\\\sf x=\dfrac{42}{7}\\\sf x=6\\\tt b)~\sf 5x+18=33\\\sf 5x=33-18\\\sf 5x=15\\\sf x=\dfrac{15}{5}\\\sf x=3\\\tt c)~\sf -5x=-10x+25\\\sf -5x+10x=25\\\sf 5x=25\\\sf x=\dfrac{25}{5}\\\sf x=5\end{array}}$