ROZWIAZYWANIE ROWNAN.
a) x + 5 = 42
b) 7 + x = -5
c) -5 + x = 30
d) x + 4 = 2x
e) 3x = 15
f) ¼x = 20
g) x = ½x + 4
h) 2x = 10
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a) x + 5 = 42
x=42-5
x=37
b) 7 + x = -5
x=-5-7
x=-12
c) -5 + x = 30
x=30+5
x=35
d) x + 4 = 2x
4=2x-x
x=4
e) 3x = 15 /:3
x=5
f) ¼x = 20 /·4
x=80
g) x = ½x + 4
x-½x=4
½x=4 /·2
x=8
h) 2x = 10 /:2
x=5
x=
a)37
b)-12
c)35
d)4
e)5
f)80
g)8
h)6