1. Rozwiąż równania. a) 3(y - 5) + 8 + 17 b) 5(x - 6) + 25 = 10 c) 4(3x + 1) - ( x +3) = 16x - 8 d) 3x - 2(x - 1 ) = 3(1 + x ) Proszę o jaknajszybsze rozwiązanie ! Daje 20 punktów !
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a) 3(y - 5) + 8 + 17=0
3y-15+8+17=0
3y = 15-8-17
3y= -10 /:3
y = - 3 1/3
b) 5(x - 6) + 25 = 10
5x-30+25=10
5x=10+30-25= 15 /:5
x = 3
c) 4(3x + 1) - ( x +3) = 16x - 8
12x+4-x-3=16x-8
12x-x-16x = -8+3-4
-5x = -9 /: (-5)
x = 9/5 = 1 4/5
d) 3x - 2(x - 1 ) = 3(1 + x )
3x-2x+2=3+3x
-2x=3-2 = 1 /:(-2)
x = - 1/2
a) 3(y - 5) + 8 + 17
3y-15+8+17=0
3y=15-8-17
3y=-10:3
y=-3I1/3
b) 5(x - 6) + 25=10
5x-30+25=10
5x=10+30-25
5x=15:5
x=3
c) 4(3x + 1) - ( x +3) = 16x - 8
12x+4-x-3=16x-8
12x-x-16x=-8+3-4
-5x=-9:(-5)
x=1i4/5
d) 3x - 2(x - 1 ) = 3(1 + x )
3x-2x+2=3+3x
3x-2x-3x=3-2
-2x=1:(-2)
x=-1/2
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