решите уравнение двумя способами
1) (а+46)+77=184 2) (а+46)+77=184
а+46=...-.... а+.....+.....=184
а+46=... а+.....=184
а=.... а=....
2) (45+х)-16=51 3) (45+х)-16=51
45+х=51 ...16 (45-...)+х=51
45+х=... ....+х=51
х=... х=......
4)86+(42-у)=104 5)86+(42-у)=104
42-у=104...86 (86+....)-у=104
42-у=.... .....-у=128
у=.... у=.....
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