Temat zadania:Równania pierwszego stopnia z jedną niewiadomą
5x-3+2x=4x+9-x
3-5y-8y+4+4y=25
0=-x-20+7x-12x+9-x+4
5x-3+2x=4x+9-x /-3x
-3+4x=9 /+3
4x=12 /:4
x=3
7-9y=25 /-7
-9y=18 /:-9
y=-2
0=-7x-7 /+7
7=-7x /:-7
x=1
2x-3+2=9
2x=8
x=4
7-9y=25
-9y=18
-y=2
y= -2
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5x-3+2x=4x+9-x /-3x
-3+4x=9 /+3
4x=12 /:4
x=3
3-5y-8y+4+4y=25
7-9y=25 /-7
-9y=18 /:-9
y=-2
0=-x-20+7x-12x+9-x+4
0=-7x-7 /+7
7=-7x /:-7
x=1
5x-3+2x=4x+9-x
2x-3+2=9
2x=8
x=4
3-5y-8y+4+4y=25
7-9y=25
-9y=18
-y=2
y= -2