Odpowiedź:
2x-3+x=10 / +3
2x + x = 10 + 3
3x = 13 / : 3
x = [tex]4\frac{1}{3}[/tex]
13=4-5x
4-5x=13 / -4
-5x = 9 / : (-5)
x = [tex]-\frac{9}{5}[/tex]
x = [tex]-1\frac{4}{5}[/tex]
7+x/3=2 / -7
x/3 = -5 / * 3
x = -5 * 3
x = -15
2 1/2x-1=8 / + 1
2 1/2x = 9 / : [tex]2\frac{1}{2}[/tex]
x = 9 : [tex]2\frac{1}{2}[/tex]
x = [tex]\frac{9}{1}[/tex] : [tex]2\frac{1}{2}[/tex]
x = [tex]\frac{9}{1}[/tex] : [tex]\frac{5}{2}[/tex]
x = [tex]\frac{9}{1}[/tex] * [tex]\frac{2}{5}[/tex]
x = [tex]\frac{18}{5}[/tex]
x = [tex]3\frac{3}{5}[/tex]
