kat1297
26.07.2021 •
Mathematics
A student solves the following equation and determines that the solution is −2. Is the student correct? Explain.
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Ответ:
x = 9cm
Step-by-step explanation:
44cm=2×10 cm + 4(x-3cm)
44cm=20cm+4x-12cm
44cm=8cm+4x
44cm-8cm=4x
36cm=4x
36cm/4=4x/4
9cm=x