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简介:
1、解方程。
2x-16=5.6 (x+6.9)÷4=2.5
2x-16+16=5.6 +16 (x+6.9)÷4×4=2.5×4
2x=21.6 x+6.9=10
X=10.8 x+6.9-6.9=10-6.9
x=3.1
3.2x+1.5×2=12.6 5(x-2.5) =5.5
3.2x+3=12.6 5(x-2.5)÷5 =5.5÷5
3.2x+3-3=12.6-3 x-2.5=1.1
3.2x=9.6 x-2.5+2.5=1.1+2.5
3.2x÷3.2=9.6÷3.2 X=3.6
x=3
(2x-4.6)÷6=1.8
(2x-4.6)÷6×6=1.8×6
2x-4.6 =10.8
2x-4.6+4.6 =10.8+4.6
2x =10.8+4.6
2x=15.4
2x÷2=15.4÷2
x=7.7