Question

谁能解答以下方程式，火急！ 2+3(x-26）=92-x 5x+4(x+1）=13 (x+4）x5=(x+18）x3

Answer 1

2+3(x-26）=92-x
解:
2+3x-78=92-x
3x+x=92+78-2
4x=168
x=168÷4
x=42

5x+4(x+1）=13
解:
5x+4x+4=13
9x=13-4
9x=9
x=1

(x+4）x5=(x+18）x3
解:
5x+20=3x+54
5x-3x=54-20
2x=34
x=34÷2
x=17

Answer 2

2+3(x-26）=92-x
2+3x-3×26=92-x
3x+x=92+3×26-2
4x=168
x=168÷4
x=42

5x+4(x+1）=13
5x+4x+4=13
9x=13-4=9
x=9÷9
x=1

(x+4）x5=(x+18）x3
5x+20=3x+54
5x-3x=54-20
2x=34
x=34÷2
x=17