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9(4x-3)-7(3x+5)=5(3x+10)-4(2x+15)-4...pleasee ..ajutati-ma:(


Răspuns :

9(4x-3)-7(3x+5)=5(3x+10)-4(2x+15)-4 <=>
<=> 36x-27-21x-35=15x+50-8x-60-4 <=> 15x-62=7x-14 <=>
<=> 15x-7x=62-14 <=> 8x=48 => x=48/8 => x=6.
36x-27-21x-35=15x+50-8x-60-4
15x-62=7x-14
15x-7x=62-14
8x=48
x=6
acum e corect!