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------ * 8 = x - 3
2
skracamy 2 z 8
4x + 12 = x - 3
3x = -15 /:3
x = -5
x + 3
3
b) 4* (2x - ---- ) = 53
4
8x - 3 = 53
8x = 50 /:8
x = 6 1/4
c) 2*(x + 7) = 3 * (2x - 5)
2x + 14 = 6x - 15
-4x = -29 /:(-4)
x = 7 1/4
d) 3 * (x - 5) + 7 = x + 1
3x - 15 + 7 = x + 1
2x = 9 /:2
x = 4 1/2
pomnóż obie strony przez 2
(x+3)*8=2x-6
8x-24=2x-6
6x=-6+24=18
x=3
b)
8x-12/4=53
8x=53-3
8x=50
x=6 i 1/4
c)
2x+14=6x +15 |-6x
-4x+14=15 |-14
-4x=-1 |:-4
x=1/4
d)
3x-15+7=x+1 |-x
2x-8=1 |+8
2x=9
x=4,5=4 i 1/2
Mam nadzieję że pomogłam.
Liczę na naj .
Pozdrawiam.