Question

Solve http://prntscr.com/71sxhc

Answer 1

\[x+\frac78=4\\x=4-\frac78\\x=3+1-\frac78\\x=3+\frac88-\frac78\\x=3+\frac{8-7}8\\x=3+\frac18\\x=3\tfrac18\]

Answer 2

Thank you so much

Answer 3

and you can check your result like this:
Equation was
\[x+\frac78=4\]
our solution was \(x=3\tfrac18\).

Plugging the solution back into the equation...

\[3\tfrac18+\frac78=4\]

if this equation holds true, then our solution solves the equation.

Answer 4

\[3+\frac18+\frac78=4\\
3+\frac{1+7}8=4\\
3+\frac88=4\\
3+1=4\\
4=4\]
which is always true.

Answer 5

Awesome