单选题
Solve the equation for x: 2(x-3)+9=4x-7
- 1、
【正确答案】
1、5
【答案解析】To solve this problem, isolate x on the left side of the equation by performing the necessary calculations:
2(x-3)+9=4x-7
First, distribute the 2:
2x-6+9=4x-7
Next, perform the addition on the left side:
2x+3=4x-7
Now, subtract 3 from both sides:
2x=4x-10
Next, subtract 4x from each side:
-2x=-10
Finally, divide both sides by -2:
x=5
2(x-3)+9=4x-7
First, distribute the 2:
2x-6+9=4x-7
Next, perform the addition on the left side:
2x+3=4x-7
Now, subtract 3 from both sides:
2x=4x-10
Next, subtract 4x from each side:
-2x=-10
Finally, divide both sides by -2:
x=5