Rozwiąrz i sprawdź równania :
a) x/7 + 4 = -1
b) x/3 - 6 = 8
c) x/4 +9 = 5
Z góry dziekuje
x/7=-1-4
x/7=-5/*7
x=-35
spr. -35/7+4=-5+4=-1
x/3=8+6
x/3=14/*3
x=42
spr. 42/3-6=14-6=8
x/4=5-9
x/4=-4/*4
x=-16
spr -16/4+9=-4+9=5
a) x/7 + 4 = -1 /*7
x + 28 = -7
x = -7 -28
x = -35
-35/7 + 4 =-1
-5 + 4 = -1
b)
x/3 - 6 = 8 /*3
x - 18 = 24
x = 42
42/3 - 6 = 8
14 - 6 = 8
c)
x/4 + 9 = 5 /*4
x + 36 = 20
x= -16
-16/4 +9 = 5
-4 + 9 =5
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a) x/7 + 4 = -1
x/7=-1-4
x/7=-5/*7
x=-35
spr. -35/7+4=-5+4=-1
b) x/3 - 6 = 8
x/3=8+6
x/3=14/*3
x=42
spr. 42/3-6=14-6=8
c) x/4 +9 = 5
x/4=5-9
x/4=-4/*4
x=-16
spr -16/4+9=-4+9=5
a) x/7 + 4 = -1 /*7
x + 28 = -7
x = -7 -28
x = -35
-35/7 + 4 =-1
-5 + 4 = -1
b)
x/3 - 6 = 8 /*3
x - 18 = 24
x = 42
42/3 - 6 = 8
14 - 6 = 8
c)
x/4 + 9 = 5 /*4
x + 36 = 20
x= -16
-16/4 +9 = 5
-4 + 9 =5