Χ+32=50, 45➗Χ=9, Χ*12=144, 100 - Χ = 65, Χ➗10=80, 72➗Χ=6, Χ*7=63, 78+Χ=186, Χ+35=60, Χ-15=30, Χ*5=25, Χ : 5=90.

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