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2E+B=14 ×2
3E+2B=24
4E+2B=28
________
E=4
3E+2B=24
3(4)+2B=24
12+2B=24
2B=24-12
B=6
4E+3B=?
4(4)+3(6)=34
jadi jawabannya Rp34.000,00