Question

五年级的解方程（1）2.84-5x=5.8(2)1.6x+2.4=7.2(3)3.4x-6=4.2(4)7.8x+5=4

Answer 1

（1）2.84-5x=5.8

5x=5.8-2.84

5x=2.96

x=0.592

(2)1.6x+2.4=7.2

1.6x=7.2-2.4

1.6x=4.8

x=3

(3)3.4x-6=4.2

3.4x=4.2+6

3.4x=10.2

x=3

(4)7.8x+5=44

7.8x=44-5

7.8x=39

x=5