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=3x-3
jawabannya c.
= 8x - 10 - 5x + 7
= 3x -3 => JAWABANNYA C
-3x = -3
x = -3 / -3
x = 1
jika dimasukan kedalam persamaan :
2(4(1)-5)-5(1)+7=0
2(4-5)-5+7=0
2(-1)-5+7=0
-2-5+7=0
-7+7=0
0=0