Answer:
a) he should multiply by 6 both sides of the equation
b)
[tex]\frac x6=\frac52\ \ \ |\cdot 6\\ x=6\cdot \frac52\\ x=\frac{30}2\\ x=15[/tex]
Check:
[tex]\frac{15}6=\frac52\\ \frac52=\frac52[/tex]
c)
[tex]\frac x{10}=\frac25\ \ \ \ |\cdot 10\\ x=10\cdot \frac25\\ x=\frac{20}5\\ x=4[/tex]
Check:
[tex]\frac4{10}=\frac25\\ \frac25=\frac25[/tex]
Step-by-step explanation:
In equations like [tex]\frac xb=\frac cd[/tex], where x is an unknown number, you may multiply both sides of that equation by b.
You get [tex]x=b\cdot \frac cd[/tex]
Than, you put b to the numerator, you get [tex]x=\frac{b\cdot c}d[/tex] and calculate the fraction on the right side of the sign "="
