2 less than (3 times a number) is the same as (the number plus 10) 2 less than (3*x) = (x + 10) 3x - 2 = x + 10 From here, you solve! :)
3x - 2 - x = x + 10 - x 2x - 2 = 10 2x - 2 + 2 = 10 + 2 2x = 12 2x / 2 = 12 / 2 x = 6
Hope this helps! :)
We defined a variable x for the unknown number and set up the equation 3 x − 2 = x + 10 . By solving this, we find that the number is 6 . This was verified through substitution back into the original expressions.
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Jawab:$1092Penjelasan dengan langkah-langkah:Ā = jumlah yang dibayar AliceB̄ = jumlah yang dibayar BerniceC̄ = jumlah yang dibayar CarolineT̄ = total biaya hadiahPersamaan 1: Ā = (2/5)(B̄ + C̄)Persamaan 2: B̄/(Ā + C̄) = 1/2Persamaan 3: B̄ = Ā + 52Persamaan 4: T̄ = Ā + B̄ + C̄Penyelesaian:Dari Persamaan 2:B̄/(Ā + C̄) = 1/22B̄ = Ā + C̄C̄ = 2B̄ - ĀSubstitusi ke Persamaan 1:Ā = (2/5)(B̄ + 2B̄ - Ā)Ā = (2/5)(3B̄ - Ā)5Ā = 6B̄ - 2Ā7Ā = 6B̄Ā = (6/7)B̄Substitusi ke Persamaan 3:B̄ = (6/7)B̄ + 52B̄ - (6/7)B̄ = 52(1/7)B̄ = 52B̄ = 364Hasil:B̄ = 364Ā = (6/7) × 364 = 312.0C̄ = 2 × 364 - 312.0 = 416.0T̄ = 312.0 + 364 + 416.0 = 1092.0Jawaban: Biaya hadiah adalah $1092.0. Keterangan gambar:Bar Alice menempel di 312 Bar Bernice di 364 Bar Caroline di 416