Question

一道方程计算题

要有解释和过程 都要详细点！
45*（X+2）+45*1.2*X=684

Answer 1

45*（X+2）+45*1.2*X=684
解：45x+90+45*1.2x=684
45x+54x=684-90
99x=594
x=6

Answer 2

45*(X+2+1.2x)=684
2.2X+2=684/45
2.2X+2=15.2
2.2X=15.2-2
2.2X=13.2
X=13.2/2.2
X=6

Answer 3

解：原式等于
45X+45×2+54X=684
99X+90=684
99X=594
(100－1)X=600－6
X=6

Answer 4

45×(x+2)+45×1.2×x=684
45x+90+54x=684
99x=684-90
99x=594
x=6

Answer 5

45x+90+54x=684
99x=684-90
99x=594
x=594/99
x=6

Answer 6

x等于0.086400