(x-6)乘7=2x怎么做

---

(x-6)乘7=2x
7x-42=2x
7x-2x=42
5x=42
x=42÷5
x=8.4

---

。雀尘。明敬。。顷槐禅。
原式：7x-42=2x
5x-42=0
5x=42
x=42/5

---

(x-6)乘7=2x
7x-42=2x
7x-2x=42
5x=42
x=8.4

---

(x-6)乘7=2x
7x-42=2x
5x=42
x= 8.4

---

7x-6*7=2x
7x-2x=6*7
5x=42
x=42÷5
x=8.4

---