2x+3(50+x)=450这个方程整样解答小学答案

2x+3(50+x)=450
2x+150+3x=450
5x=450-150=300
5x÷5=300÷5
x=60

2x+150+3x=450
5x=450-150
x=60

2x+3(50+x)=450
2X+150+3X=450
5X=300
X=60

2x+3×50+3×x=450 利用乘法分配律
5x+150=450
5x=450-150
5x=300
x=300÷5
x=60

先去括号,用分配率作答
2x+150+3x=450
2x+3x+150=450
5x+150=450
再移向，把150移到等式到右边
5x=450-150
5x=300
x=60

2x+3(50+x)=450
2x+150+3x=450
5x=450-150=300
5x÷5=300÷5
x=60
...

2X+3（50+X）=450
2X+（3×50+3X）=450
2X+150+3X=450
5X+150=450
5X=450-150
5X=300
X=300÷5
X=60

2x+150+3x=450；5x=300；x=60

2x+150+3x=450
5x+150=450
5x=300
x=60

2x+3(50+x)=450
2x+3×50+3x=450
5x+150-150=450-150
5x÷5=300÷5
x=60

2x+3(50+x)=450
2X+150+X=450
3X+150=450
3X=450-150
X=300÷3
X=100

2X+3[50+X]=450
2X+150+3X=450
[2+3]X+150=450
5X+150=450
5X=450-150
5X=300
X=300/5
X=60