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x = 6
b. 4x = -28
x = -7
c. 5x + 4 = 3x - 6
2x = -10
x = -5
d. x - 8 + 4 = 6x + 21 - 9
5x = -16
x = -3,2
14+4 = 6x-3x
18=3x
x=6
b) 7-5x = 35-x
-5x+x = 35-7
-4x= 28
x = -7
maaf saya hanya bisa itu dan semoga membantu