Pomóż : )
1) -x + 25 = 2x-2
2)25m - 3= 24m - 4
3) 17 y + 28 = 19 y +27
4) -9s +15 = 4s - 14
5) 8k - 19 = -8k +19
6) 2 * (x+4) = 12
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Rozwiązalam już sama ale nwm czy dobrze więc proszę pomozcie :))))
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1) -x + 25 = 2x-2
-3x = -27 /:(-3)
x = 9
2) 25m - 3= 24m - 4
m = -1
3) 17y + 28 = 19y +27
-2y = -1 /:(-2)
y = 0,5
4) -9s +15 = 4s - 14
-13s = -29 /:(-13)
s = 29/13
5) 8k - 19 = -8k +19
16k = 38 /:16
k = 19/8 lub 2,375
6) 2 * (x+4) = 12
2x + 8 = 12
2x = 4 /:2
x = 2
1) -x + 25 = 2x-2
2x+x = 25+2
3x = 27 /:3
x = 9
2) 25m -3= 24m -4
25m-24m = -3+4
m = 1
3) 17y + 28 = 19y +27
19y-17y = 28-27
2y = 1 /:2
y = 0,5
4) -9s +15 = 4s -14
-9s -4s = -14-15
-13s = -29 /:-13
s = 2,23077 (w przybliżeniu)
5) 8k -19 = -8k +19
8k+8k = -19-19
16k = -38 /:16
k = -2,375
6) 2*(x+4) = 12
2x+8 = 12
2x = 12 -8
2x = 4 /:2
x = 2