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1/3x+2=x
2= x - 1/3x
2 = 2/3x
2 * 3/2=x
x= 3
2.
-7(2x +1)=4
-14x - 7=4
-14x=4+7
-14x=11
x= - 11/14
3. nie wiem ;D
4.
3(1-5x)-(3x-7)≥-2
3-15x - (-3x) + 7 >_ -2
10 - 12x >_ -2
12x>_-12
x>_1
⅓x+2=x
⅓x-x=-2
-2/3x=-2 /:(-2/3)
x=3
2.
-7(2x+1)=4
-14x-7=4
-14x=11 /:(-14)
x= -11/14
3.
-
4.
3(1-5x)-(3x-7)≥-2
3-15x-3x+7≥-2
-18x+10≥-2
-18x≥-2-10
-18x≥-12 /:(-18)
x≥2/3