kk/ bg tolong jawab matematika ini kk/ bg beserta cara mencari nya plisss kk/ bg soal nys besok dilumpul plisss ​

Nomor 1

x = 102

3y = 180 – 102

3y = 78

y = 78/3

y = 26

z = 102

Nomor 2

2x + 10 = 70

2x + 70 – 10

2x = 60

x = 60/2

x = 30

Nomor 3

3x + 60 = 120

3x = 120 – 60

3x = 60

x = 60/3

x = 20

Nomor 4

7x + 25 = 130

7x = 130 – 25

7x = 105

x = 105/7

x = 15