Bantu jawab ya bang besok bawa sekolah ajg​

Jawab:

a. 28

b. 18

c. 9

d. – 10

e. 5

Penjelasan dengan langkah-langkah:

a. 12 + x = 40

x = 40 – 12

x = 28

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b. 14 – x = – 4

14 + 4 = x

x = 18

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c. 4x – 5 = 31

4x = 31 + 5

4x = 36

x = 36/4

x = 9

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d. 8 + y = – 2

y = – 2 – 8

y = – 10

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e. 3x – 4 = 2x + 1

3x – 2x = 1 + 4

x = 5

Jawaban:

a. 12 + x = 40

x = 40 – 12

x = 28

b. 14 – x = -4

14 + 4 = x

x = 18

c. 4x – 5 = 31

4x = 36

x = 9

d. 8 + y = -2

y = -10

e. 3x – 4 = 2x + 1

x = 5