4 tháng 10 2022 lúc 13:01
\(5\left(x+7\right)-40=2^2.5\)
\(5\left(x+7\right)-40=20\)
\(5\left(x+7\right)=20+40\)
\(5\left(x+7\right)=60\)
\(x+7=60\div5\)
\(x+7=12\)
\(x=12-7\)
\(x=5\)
\(\left(3x-2^4\right).7^3=2.7^4\)
\(\left(3x-2^4\right).7^3=4802\)
\(3x-2^4=4802\div7^3\)
\(3x-2^4=14\)
\(3x=14+2^4\)
\(3x=30\)
\(x=30\div3\)
\(x=10\)
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5(x+7)−40=22.55(x+7)−40=22.5
5(x+7)−40=205(x+7)−40=20
5(x+7)=20+405(x+7)=20+40
5(x+7)=605(x+7)=60
x+7=60÷5x+7=60÷5
x+7=12x+7=12
x=12−7x=12−7
x=5x=5
(3x−24).73=2.74(3x−24).73=2.74
(3x−24).73=4802(3x−24).73=4802
3x−24=4802÷733x−24=4802÷73
3x−24=143x−24=14
3x=14+243x=14+24
3x=303x=30
x=30÷3x=30÷3
x=10x=10
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