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Elena began to solve this equation:
Step 0: 12+6(42+3) = 2 (6x + 4) - 2
Step 1: 12x+6(4x + 3) = 3 (2 (6x + 4) - 2)
Step 2: 12x + 6(4x + 3) = 6 (6x + 4) - 6
Step 3: 12x + 24x + 18 = 36x + 24-6
1.
When she got to the last line she stopped and said the equation is true for all values of a How could
Elena tell?
Sagot :
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