Toán Lớp 6: 1 5 − ( ???? + 4 ) = − 1 2 − 3
16-x=53-102
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Toán Lớp 6: 1 5 − ( ???? + 4 ) = − 1 2 − 3
16-x=53-102
Comments ( 2 )
a)\\
1{\rm{ }}5{\rm{ }} – {\rm{ }}\left( {{\rm{ x + }}4{\rm{ }}} \right){\rm{ }} = {\rm{ }} – {\rm{ }}1{\rm{ }}2{\rm{ }} – {\rm{ }}3\\
15 – \left( {x + 4} \right) = – 15\\
x + 4 = 15 – \left( { – 15} \right)\\
x + 4 = 15 + 15\\
x + 4 = 30\\
x = 30 – 4\\
x = 26\\
b)\\
16 – x = 53 – 102\\
16 – x = – 49\\
x = 16 – \left( { – 49} \right)\\
x = 16 + 49\\
x = 65
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