2×__kg+ 3×15 kg= 55kg
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2× a kg + 3 × 15 kg = 55 kg
2 × a kg + 45 kg = 55 kg
2× a kg =( 55- 45) kg
2× a kg = 10 kg
a kg =( 10/2) kg
a kg = 5 kg
Step-by-step explanation:
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