persamaan 4x + 3y = 23 dan 5x - 7y = -25.
Nilai -3x + 6y adalah?
4x + 3y = 23 .... |×7| 28x + 21y = 161
5x - 7y = -25 .... |×3| 15x - 21y = -75
_____________________________+
43x = 86
x = 2
→ 4x + 3y = 23
→ 4(2) + 3y = 23
→ 8 + 3y = 23
→ 3y = 23 - 8
→ 3y = 15
→ y = 5
→ -3x + 6y
→ -3(2) + 6(5)
→ -6 + 30
→ 24
Jadi nilai dari -3x + 6y adalah 24 Opsi (C.)
[tex]\purple{\boxed{\blue{\boxed{\green{\star{\orange{\ \: \: \mathcal{JK} \: \: \: {\green{\star}}}}}}}}} [/tex]
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Verified answer
Diketahui :
persamaan 4x + 3y = 23 dan 5x - 7y = -25.
Ditanya :
Nilai -3x + 6y adalah?
Penyelesaian :
4x + 3y = 23 .... |×7| 28x + 21y = 161
5x - 7y = -25 .... |×3| 15x - 21y = -75
_____________________________+
43x = 86
x = 2
→ 4x + 3y = 23
→ 4(2) + 3y = 23
→ 8 + 3y = 23
→ 3y = 23 - 8
→ 3y = 15
→ y = 5
→ -3x + 6y
→ -3(2) + 6(5)
→ -6 + 30
→ 24
Kesimpulan
Jadi nilai dari -3x + 6y adalah 24 Opsi (C.)
Detail Jawaban.•:。
[tex]\purple{\boxed{\blue{\boxed{\green{\star{\orange{\ \: \: \mathcal{JK} \: \: \: {\green{\star}}}}}}}}} [/tex]