Jawaban:

2a + 1 = a - 3

2a - a = -3 - 1

a = -4

12 + 3a = 5 + 2a

3a - 2a = 5 - 12

a = -7

3(x + 1) = 2(x + 4)

3x + 3 = 2x + 8

3x - 2x = 8 - 3

x = 5

5(y - 1) = 4y

5y - 5 = 4y

5y - 4y = 5

y = 5

m - 9 = -13

m = -13 + 9

m = -4

2x + 3 = 11

2x = 11 - 3

2x = 8

x = 8/2

x = 4

7x = 8 + 3

7x = 11

x = 11/7

3p + 5 = 17 - p

3p + p = 17 - 5

4p = 12

p = 12/4

p = 3

7q = 5q - 12

7q - 5q = -12

2q = -12

q = -12/2

q = -6

6 - 5y = 9 - 4y

-5y + 4y = 9 - 6

-y = 3

y = -3

Penjelasan dengan langkah-langkah:

Jika suatu bilangan positif pindah kesisi sebaliknya, maka ia akan bernilai negatif.