Question

1. Oblicz wartość liczbową wyrażenia:

a) 3x - 5 dla x= -3
.................................

b) 2m - 3n dla m=0 i n=⅓
.................................


2. Zapisz w prostszej postaci:

a) 3x + 2x = .....................
6x - x = .....................
-8x + 5x = ....................
x - 4x = ....................

b) 2a + 1 + a = ...............
4a - 5a - 3 = .................
-5a + 7b + 6a = ................
6b - 6a + 2b = .................

c) 4 * 7y = ...............
12y : 6 = ................
(-8y) * ½ = ................
10a : (-2) = .................

Answer 1

2. a) 3x + 2x = 5x
6x - x =5x
-8x + 5x = 3x
x - 4x = -3x

b) 2a + 1 + a =3a + 1
4a - 5a - 3 = -1a - 3
-5a + 7b + 6a =1a + 7b
6b - 6a + 2b = 8b -6a

c) 4 * 7y = 28y
12y : 6 = 2y
(-8y) * ½ = -4y
10a : (-2) = -5a

1. a) 3x - 5 dla x= -3
3 razy (-3) - 5 = -9 -5 = -14

b) 2m - 3n dla m=0 i n=⅓
2 razy 0 - 3 razy 1/3 = 2 - 1 = 1

Answer 2

1.

a) 3x - 5 dla x= -3
3*(-3)-5=-14


b) 2m - 3n dla m=0 i n=⅓
2*0-3*⅓=1

2.

a) 3x + 2x = 5x
6x - x = 5x
-8x + 5x = -3x
x - 4x = 3x

b) 2a + 1 + a = 3a+1
4a - 5a - 3 =-a-3
-5a + 7b + 6a = a+7b
6b - 6a + 2b =8b-6

c) 4 * 7y = 28y
12y : 6 = 2y
(-8y) * ½ = -4y
10a : (-2) = -5a

Answer 3

A)3 razy-3-5=-9-5=-14
b)2razy0 -3razy1/2=0-3/2=-3/2
2a)5x
5x
-3x
-3x
b)3a+1
-a-3
a+7b
8b-6a
c)28y
2y
-4y
-5a
proszę