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30-22=4x
8=4x
x=2
2(2x + 3) + 2.8 = 30
4X + 6 + 16 = 30
nah pisahkan nilai x , yg gak memiliki x pindah ke ruas kanan menajadi -
4x = 30 -6 - 16
= 8
x = 8 / 4
= 2