Question

Determine o valor de x

Answer 1

a) $\frac{x}{x+3}=\frac{4}{6}\\x\cdot \:6=\left(x+3\right)\cdot \:4\\x\cdot \:6=4x+12\\2x=12\\x=\frac{12}{2} \\x=6$

b) $\frac{x}{10}=\frac{3}{2}\\\frac{x}{10}\cdot \:10=\frac{3}{2}\cdot \:10\\x=\frac{30}{2} \\x=15$