Rozwiąż równania.
a) x+2,3=1 1/4
b) y-6 1/2=-7
c) z-2/5=0,4+2
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a) x+2,3=1 1/4
x+2,3 = 1,25
x=-1,05
b) y-6 1/2=-7
y=-7+ 6 1/2
y= - 1/2
c) z-2/5=0,4+2
z-0,4 = 0,4+2
z=0,4+0,4+2
z=2,8
2/5 =0,4
1/4 = 0,25
a)
x+2,3=1 1/4
x = 1,25 - 2,3
x = 1,25 + (-2,3)
x = -(2,30 - 1,25)
x = - 1,05
b)
y-6 1/2=-7
y = - 7 + 6 1/2
y = -(7 - 6 1/2)
y = - 1/2
c
z-2/5=0,4+2
z - 2/5 = 2,4
z = 2,4 + 2/5
z = 2,4 + 0,4
z = 2,8