400+600:a=1000
600:a=1000-400
a=600:600
a=1
[tex]400+600:a=1000 \\600 : a = 1000 - 400 \\ 600 :a = 600 \\a = 600 : 600 \\ \boxed{a = 1} \\ - - - - - - - - - \\ 400 + 600 \cdot1 = 1000 \\ 400 + 600 = 1000 \\ 1000 = 1000[/tex]
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400+600:a=1000
600:a=1000-400
a=600:600
a=1
Verified answer
[tex]400+600:a=1000 \\600 : a = 1000 - 400 \\ 600 :a = 600 \\a = 600 : 600 \\ \boxed{a = 1} \\ - - - - - - - - - \\ 400 + 600 \cdot1 = 1000 \\ 400 + 600 = 1000 \\ 1000 = 1000[/tex]