Question 1047770
Seven times a number minus twelve is the same as two times the number plus thirty
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Substitute x for the words "a number" and "the number"
</pre>
Seven times x minus twelve is the same as two times x plus thirty
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Substitute a equal sign for the words "is the same as"
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Seven times x minus twelve = two times x plus thirty
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Substitute 7x for the words "Seven times x"
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7x minus twelve = two times x plus thirty
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Substitute 2x for the words "two times x"
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7x minus twelve = 2x plus thirty
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Substitute - 12 for the words "minus twelve"
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7x - 12 = 2x plus thirty
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Substitute + 30 for the words "plus thirty"
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7x - 12 = 2x + 30
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Subtract 2x from both sides

5x - 12 = 30

Add 12 to both sides

5x = 42

Divide both sides by 5

x = 42/5

Edwin</pre>