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2b+1p=5500 |×2 | 4b+2p=11000 -
0 + 1p=1500
1p+1500
a. 2b+1p=5500
2b+1500=5500
2b=5500-1500
2b=4000
b=4000:2=2000
b=2000
b. 1b+1p= 2000+1500= 3500
2x+y=5500 |2| 4x+2y=11000 -
y=1500
disubstitusikan.. harga 1 buku=1500 dan 1 pensil=2000
2x+1500=5500 jika membantu,kasih bintang ya..
2x=5500-1500
x=4000:2
x=2000