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25+30c=15+40c求解 25+30c=15+40c 方程:
简化
25 + 30c = 15 + 40c
解:
25 + 30c = 15 + 40c
求解变量 'c'.
移动所有条件 c 到左边,所有其他条件放右边.
添加 '-40c' 到等式的每一边.
25 + 30c + -40c = 15 + 40c + -40c
组合类似条件: 30c + -40c = -10c
25 + -10c = 15 + 40c + -40c
组合类似条件: 40c + -40c = 0
25 + -10c = 15 + 0
25 + -10c = 15
添加 '-25' 到等式的每一边.
25 + -25 + -10c = 15 + -25
组合类似条件: 25 + -25 = 0
0 + -10c = 15 + -25
-10c = 15 + -25
组合类似条件: 15 + -25 = -10
-10c = -10
两边除以'-10'.
c = 1
简化
c = 1
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