(1) To solve this equation, we need to isolate the variable x. First, let's get rid of the fraction on the left side by multiplying every term by the denominator, which is 9: 5/9 * 9 + x * 9 = 31/3 * 9 After simplifying, we have: 5 + 9x = 93 Next, let's isolate x by subtracting 5 from both sides: 5 + 9x - 5 = 93 - 5 Simplifying further, we get: 9x = 88 Finally, divide both sides by 9 to solve for x: 9x/9 = 88/9 Thus, the solution is: x = 88/9 (2) To solve this equation, we need to isolate the variable x. First, let's get rid of the fraction on the left side by multiplying every term by the denominator, which is 5: 4/5 * 5 - x * 5 = 7/15 * 5 After simplifying, we have: 4 - 5x = 7/3 Next, let's isolate x by subtracting 4 from both sides: 4 - 4 - 5x = 7/3 - 4 Simplifying further, we get: -5x = 7/3 - 12/3 -5x = -5/3 Finally, divide both sides by -5 to solve for x: -5x/-5 = -5/3 / -5 x = 1/3 Thus, the solution is: x = 1/3 (3) To solve this equation, we need to isolate the variable x. First, let's get rid of the fraction on the left side by multiplying every term by the denominator, which is 8: x * 7/8 * 8 = 1/2 * 8 After simplifying, we have: 7x = 4 Next, divide both sides by 7 to solve for x: 7x/7 = 4/7 Thus, the solution is: x = 4/7 (4) To solve this equation, we need to isolate the variable x. First, let's combine like terms on the left side by adding x and 1/3x: (1 + 1/3)x = 28 Next, let's simplify further: (4/3)x = 28 Finally, divide both sides by 4/3 to solve for x: (4/3)x / (4/3) = 28 / (4/3) Thus, the solution is: x = 21

總結

以上是生活随笔為你收集整理的解方程。⑴5/9+Χ=31/3⑵4/5-Χ=7/15⑶Χ×7/8=1/2⑷Χ+1/3Χ=28的全部內容，希望文章能夠幫你解決所遇到的問題。

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