Question

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Answer 1

The solution to the system of equations expressed as a coordinate point is $(x.y)=(-1,1)$

To solve the system

$3x + y = -2\\y = 2x + 3$

Note that $y$ is already made subject of formula in $y = 2x + 3$. So substitute the value for $y$ into $3x + y = -2$ to eliminate $y$ and leave us with an equation with $x$

$3x + y = -2\\3x + (2x+3) = -2\\3x+2x+3=-2\\3x+2x=-2-3\\5x=-5\\\frac{5x}{5}=\frac{-5}{5}\\x=-1$

Substitute this value of $x$ into $y = 2x + 3$ to get the value of $y$

$y = 2(-1) + 3\\y=-2+3\\y=1$

The solutions are $x=-1,y=1$, or expressed as a coordinate point

$(x.y)=(-1,1)$

Learn more about systems of equations here: brainly.com/question/16763389