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3z = -28 - 11
3z = -39
z = -39/3
z = -13
B.) 25 - 4y + 5y + 15
-4y + 5y = -15 - 25
y = -40
C.) -4x - 15 = 1-8x
-4x + 8x = 1 + 15
4x = 16
x = 16/4
x = 4
3z + 11-11 = -28 - 11
3z = -39
3z / 3 = -39/3
z = -13
Hp: {-13 }
B.) no 2 kurang jelas, tolong soalnya diperbaiki dan saya akan menjawabnya :D
mungkin maksud soalnya spt ini:
B.) 25 - 4y =5y + 15
25 - 25 - 4y = 5y + 15-25
4y -5y = 5y - 5y + -10
-y = -10
y = 10
Hp: {10 }
C.) -4x - 15 = 1-8x
-4x - 15+15= 1+15 - 8x
-4x + 8x = 16 - 8x + 8x
-4x = 16
-4x/-4 = 16 / -4
x = -4
Hp: {-4 }
jadikan jawaban yg terbaik yaa :D