解方程.4X+2.6X=84056X=308X-13=19.-数学

题目简介

解方程.4X+2.6X=84056X=308X-13=19.-数学

题目详情

解方程.
4X+2.6X=840
5
6
X=30
8X-
1
3
=
1
9
题型:解答题难度:中档来源:不详

答案

(1)4X+2.6X=840,
6.6X=840,
6.6X÷6.6=840÷6.6,
X=class="stub"1400
11


(2)class="stub"5
6
X=30,
class="stub"5
6
class="stub"5
6
=30÷class="stub"5
6

X=36;

(3)8X-class="stub"1
3
=class="stub"1
9

8X-class="stub"1
3
+class="stub"1
3
=class="stub"1
9
+class="stub"1
3

8X=class="stub"4
9

8X÷8=class="stub"4
9
÷8,
X=class="stub"1
18

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