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Step 1. Let x be the number of 30 cents stamps.

Step 2. Let x-2 be the number of 20 cents stamps.

Step 3. Let 30x be the cost of buying x number of 30 cents stamps

Step 4. Let 20(x-2) be the cost of buying x-2 number of 20 cents stamps.

Step 5. 30x+20(x-2)=360 cents is the total cost of buying stamps.

Step 6. The following steps will solve the equation in Step 5:

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Anna Mbango

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2y ago

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