Question 1031138
Fraction skills, too.
{{{x+(1/4)x=10}}}
{{{(4/4)x+(1/4)x=10}}}
{{{(1/4)x(4+1)=10}}}
{{{(1/4)(5)x=10}}}-----computation and commutative property
{{{(1/4)5*(4)(1/5)x=4*(1/5)10}}}----multiplication principle

{{{(1/4)(4)5(1/5)x=4*10/5}}}----commutative property of multiplication again
{{{highlight(x=8)}}}-----simplification computation on right member, multiplicative inverse property on the left member.