I need some help solving the differential equation

${y}^{\u2034}=x+y\phantom{\rule{0ex}{0ex}}y(1)=3\phantom{\rule{0ex}{0ex}}{y}^{\prime}(1)=2\phantom{\rule{0ex}{0ex}}{y}^{\u2033}(1)=1$

and h=0.5 with Euler's method

I don't know how to rewrite the equation to a system of equations of the first order..

${y}^{\u2034}=x+y\phantom{\rule{0ex}{0ex}}y(1)=3\phantom{\rule{0ex}{0ex}}{y}^{\prime}(1)=2\phantom{\rule{0ex}{0ex}}{y}^{\u2033}(1)=1$

and h=0.5 with Euler's method

I don't know how to rewrite the equation to a system of equations of the first order..