4/5×1/4-1/2x=1/20
1个回答
4/5×1/4-1/2x=1/20
4/20-1/2x=1/20
3/20=1/2x
6x=20
x=10/3
相关问题
4/5×1/4-X/2=1/20这个方程怎么解?
1/1×2×3×4+1/2×3×4×5+1/3×4×5×6+……+1/17×18×19×20
1/1×2×3+1/2×3×4+1/3×4×5+.1/20×21×22解答
1\1×3 + 1\2×4+ 1\3×5 …… +1\18×20
⑴ 4(x-1)^2=9(x-5)^2 ⑵(√20+√5)÷ √5-√1/3×√ 12 ⑶(x-5)^2=(2x-1)(
解方程:5x-2=3.6;7(x-1.2)=2.1;7.5×8-4x=20;9.6x-2.4x=21.6;4x-7×1.
1/2×3+1/3*4+1/4*5+.+1/19*20=?
解方程或不等式!急(x-1)×(x+2)=(x-3)×(x-4)+20(2x+3)×(2x-5)小于(x-1)×(4x-
简算1/(2×3)+1/(3×4)+1/(4×5)+……+1/(18×19)+1/(19×20)
解方程.(1) 2 3 x× 3 4 =1÷ 20 39 (2) 7 8 - 2 5 x= 1 2 + 1 4 - 1