Question

rozwiąż równanie

8x+5=7x

.

7n+2=6n-3.

-9z-7=-z-6

25-3=24m-4

-s+15=4s-14

8k-19=-18k+19

Answer 1

a)8x-7x=-5

x=-5

b)n=-5

c)-8z=1/:(-8)

z=-1/8

d)-24m=-26/:(-24)

m=1i1/13

e)-5s=-29/:(-5)

s=5i4/5

f)26k=38/:26

k=1i6/13

Answer 2

1.

8x+5 = 7x

8x-7x = -5

x = -5

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2.

7n+2 = 6n-3

7n-6n = -3-2

n = -5

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3.

-9z-7 = -z-6

-9z+z = -6+7

-8z =1 /:(-8)

z = -1/8

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4.

25-3 = 24m-4

-24m = -4 -22

-24m = -26 /:(-24)

m = 26/24 =13/12

m = 1 1/12

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5.

-s+15 = 4s-14

-s-4s = -14 -15

-5s = -29 /:(-5)

s = 29/5

s = 5 4/5

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6.

8k-19 = -18k+19

8k+18k = 19+19

26k = 38 /:26

k = 38/26 = 19/13

k = 1 6/13

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