7x-4X2.4=44解方程?
2个回答
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解:解方程, 此方程的解为x = 268/35
7x - 4 × 2.4 = 44
7x - 4 × (2×10+4)/10 = 44
7x - 4 × 24/10 = 44
7x - 4 × 12/5 = 44
7x - 48/5 = 44
7x = 44 + 48/5
7x = 220/5 + 48/5
7x = 268/5
x = 268/5 ÷ 7
x = 268/5 × 1/7
∴x = 268/35
答:此方程的解为x = 268/35
7x - 4 × 2.4 = 44
7x - 4 × (2×10+4)/10 = 44
7x - 4 × 24/10 = 44
7x - 4 × 12/5 = 44
7x - 48/5 = 44
7x = 44 + 48/5
7x = 220/5 + 48/5
7x = 268/5
x = 268/5 ÷ 7
x = 268/5 × 1/7
∴x = 268/35
答:此方程的解为x = 268/35
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