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8x = -17 - 15
8x = - 32
x = -4
b) 6y + 20 = 47 - 3y
6y + 3y = 47 - 20
9y = 27
y = 3
c) 4a + 10 = 4 ( 2a - 3 )
4a + 10 = 8a -12
4a - 8a = -12 - 10
- 4a = - 22
a = 5,5
= 8x = - 17 - 15
= 8x = - 32
= x = -32 / 8
= x = -4
B. = 6y + 20 = 47 - 3y
= 6y + 3y = 47 - 20
= 9y = 27
= y = 27 / 9
= y = 3
C. = 4a + 10 = 4 ( 2a - 3 )
= 4a + 10 = 8a - 12
= 4a - 8a = -10 - 12
= - 4a = -22
= a = -22 / -4
= a = 5,5
Maaf kalau salah :)
Semoga membantu ^^