Ответ:
7х+30=19х-6
7х-19х=-30-6
-12х=-36
х=-36÷(-12)
х=3
7×3+30=19×3-6
21+30=57-6
51=51
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Ответ:
7х+30=19х-6
7х-19х=-30-6
-12х=-36
х=-36÷(-12)
х=3
7×3+30=19×3-6
21+30=57-6
51=51