From the conditions of this task, it is known that two identical single-digit unknown numbers were added to one known number and received another number equal to the sum of these numbers. Let’s complete the task using an equation with one unknown. Let us find the unknown term if one of the terms and the sum is known.
67 + x + x = 75;
67 + 2x = 75:
2x = 75 – 67;
2x = 12;
x = 12/2;
x = 6;
Answer: Two identical single-digit numbers equal to six were added to the number 67.
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