Solve please examples: 1) 5u +3= at +11. 2) the 20-3rd =2 (at +3). 3) 21+2kh =24-9kh 4) 20+ x =8-3kh. 5) 15-4 =18th. Solve please

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Solve examples: 1) 5u +3= at +11. 4y=8 y=2 2) the 20-3rd =2 (at +3). 5y=14 y=14/5 = 2.8 3) 21+2kh =24-9kh 11x=3 x=3/11 4) 20+ x =8-3kh. 4x=-12 x=-3 5) 15-4 =18th. 3x=-3 x=-1
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Answer add