Znajdź niewiadomą liczbę, proszę o obliczenia. Daje naj . Z góry dziękuję :)
a) 12z - 7 = 17
b) -6w - 10 = 14
c) 7w + 1 = -2w + 28
d) -5m - 20 = -2m - 2
e) 3x = 2 = 20
f) -x +7 = 5x + 1
g) 4z + 35 = -z + 5
h) 2x - 2 = 4x - 2
i) -2z + 4 = 14
j) 6y + 30 = -2y - 2
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a) 12z - 7 = 17
12z = 17+7 = 24 /:12
z = 2
b) -6w - 10 = 14
-6w = 14+10 = 24 /:-6
w = -4
c) 7w + 1 = -2w + 28
7w+2w = 28 - 1
9w = 27 /: 9
w = 3
d) -5m - 20 = -2m - 2
-5m + 2m = -2+20
-3m = 18 /:-3
m = - 6
e) 3x + 2 = 20
3x = 20 - 2 /:3
x = 6
f) -x +7 = 5x + 1
-6x = -6 /: -6
x = 1
g) 4z + 35 = -z + 5
5z = - 30 /: 5
z = - 6
h) 2x - 2 = 4x - 2
2x - 4x = -2+2
-2x = 0
x = 0
i) -2z + 4 = 14
-2z = 14-4 = 10 /:-2
z = -5
j) 6y + 30 = -2y - 2
6y+2y = -2-30
8y = -32 /:8
y = -4
a] 12z-7=17
12z=17+7
12z=24 /:12
z=2
b] -6w-10=14
-6w=14+10
-6w=24 /:-6
w= -4
c] 7w+1= -2w+28
7w+2w=28-1
9w=27 /:9
w=3
d] -5m-20= -2m-2
-5m+2m= -2+20
-3m=18 /:-3
m= -6
e] 3x-2=20
3x=20+2
3x=22 /:3
x=22/3=7 1/3
f] -x+7=5x+1
-x-5x=1-7
-6x= -6 /:-6
x=1
g] 4z+35= -z+5
4z+z=5-35
5z= -30 /:5
z= -6
h] 2x-2=4x-2
2x-4x= -2+2
-2x=0 /:-2
x=0
i] -2z+4=14
-2z=14-4
-2z=10 /:-2
z= -5
j] 6y+30= -2y-2
6y+2y= -2-30
8y= -32 /:8
y= -4
prosze bardzo,w przykladzie e] jest blad wiec zrobilam tak jak jest