Question

Me ajudem é pra amanhã

Answer 1

b)

$\dfrac{2x+3}{5}=\dfrac{15}{5}\Rightarrow 2x+3=15\Rightarrow 2x=15-3\\\\\\2x=12\Rightarrow x=\dfrac{12}{2}=6$

c)

$7x+21=2x-6\Rightarrow 5x=-27\Rightarrow x=-\dfrac{27}{5}$