wyrażenia algebraiczne
a) 8x+5=7x
b) -x+25=2x-2
c)7n+2=6n-3
d) -9z-7=-z-6
e)25m-3=24m-4
f)-5+15=45-14
g) 17y+28=19y+27
h) 8k-19=-8k+19
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a) 8x-7x = -5
x = -5
b) -x-2x=-2-25
-3x = -27
x = 9
c) 7n-6n=-3-2
n=-5
d) -9z+z=-6+7
-8z=1
z=-1/8
e) 25m-24m=-4+3
m=-1
f) 10=31 (?)
g) 17y-19y=27-28
-2y=-1
y=1/2
h) 8k+8k=19+19
16k=38
k=2 i 6/16 = 2 i 3/8