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Sagot :
1 + [2x - 3(1.8 / 0.2 ) ]
= 1 + [ 2x - 3 * 9]
=1 + [2x - 27]
= 1 + 2x - 27 associate property of addition
= 1 - 27 + 2x commutative property of addition
= -26 + 2x
= 2x - 26
= 1 + [ 2x - 3 * 9]
=1 + [2x - 27]
= 1 + 2x - 27 associate property of addition
= 1 - 27 + 2x commutative property of addition
= -26 + 2x
= 2x - 26
1.8=5/5+4/5=9/5
--------------
0.2=1/5
-------------------
1.8/0.2=(9/5)/(1/5)=(9/5)*(5/1)=9
-------------------
Therefore:
1+[2x-3(1.8/0.2)]
=1+[2x-3(9)]
=1+[2x-27]
=1+2x-27
=2x-26
=2(x-13)
--------------
0.2=1/5
-------------------
1.8/0.2=(9/5)/(1/5)=(9/5)*(5/1)=9
-------------------
Therefore:
1+[2x-3(1.8/0.2)]
=1+[2x-3(9)]
=1+[2x-27]
=1+2x-27
=2x-26
=2(x-13)
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