A student solved the problem below but made anerror. - 3x = 12+3 +3x = 15
2 answers:
Answer:
Division should be used instead of multiplication
-3x=12
x=-4 (divide by -3)
Because -3x is one term, you need to divide both sides by -3, not add 3 to both sides:
-3x = 12
Divide both sides by -3:
-3x/3 = 12/-3
x = -4
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