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5x-7x=1+3
-2x=4 |:(-2)
x=-2
b)10+4(1-x)=2x-6
10+4-4x=2x-6
-4x-2x+14=-6
-6x=-6-14
-6x=-20 |:(-6)
x=²⁰/₆
x=3 ²/₆
x=3⅓
c)-3x+1=-2(x-3)-3
-3x+1=-2x+6-3
-3x+2x=3-1
-x=2 |:(-1)
x=-2
d)(x-2)/4 =2 |*4
x-2=8
x=8+2
x=10
e)-2x+½=-3x+2½
-2x+3x=2½-½
x=2
f)1/5x-2=½x-5 |*10
2x-20=5x-50
2x-5x=-50+20
-3x=-30 |:(-3)
x=10
Równania równoważne:
a, c, e
d, f