tolong no. 6 sampai 8 dong..

14x + 4y = 38 | kali 8
8x - 6y = 30 | kali 14
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112x + 32y = 304
112x - 84y = 420
~~~~~~~~~~~~~~~~~ [ - ]
116y = -116 {116y karena + - - = +
y = -116/116
y = -1

14x - 4y = 38
14x - 4(-1) = 38
14x + 4 = 38
14x = 38- 4
x = 34/14 = 2,42

Nilai 6x - 4y = 6(2,42) - 4(-1) = 14,52 + 4 = 18,52

3.) luas juring = 22/7 × 7 × 7 × 60/360
Luaa juring = 25,666666666667cm^2