Metoda podstawiania:
a)
2x+3y=8
tu jest duża klamra {
{ x-4y=-7
2x+3=8
x-4y=-7
x=-7+4y
2(-7+4y)+3y=8
-14+8y+3y=8
11y=22
y=2
x=-7+4x2=1
x=1
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2x+3=8
x-4y=-7
2x+3y=8
x=-7+4y
2x+3y=8
2(-7+4y)+3y=8
2x+3y=8
-14+8y+3y=8
2x+3y=8
11y=22
2x+3y=8
y=2
x=-7+4x2=1
y=2
x=1
y=2