解方程 5(10x+30)-2(4x-10)=-250 (3a²-5a+4)—4(-2a²-3a+3)化简

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解方程 5(10x+30)-2(4x-10)=-250 (3a²-5a+4)—4(-2a²-3a+3)化简

解方程 5(10x+30)-2(4x-10)=-250 (3a²-5a+4)—4(-2a²-3a+3)化简
解方程 5(10x+30)-2(4x-10)=-250 (3a²-5a+4)—4(-2a²-3a+3)化简

解方程 5(10x+30)-2(4x-10)=-250 (3a²-5a+4)—4(-2a²-3a+3)化简
5(10x+30)-2(4x-10)=-250
50x+150-8x+20=-250
42x=-250-150-20
=-420
x=-420÷42
=-10
(3a²-5a+4)—4(-2a²-3a+3)
=3a²-5a+4+8a²+12a-12
=11a²+7a-8

X=Y

5(10x+30)-2(4x-10)=-250
50x+150-8x+20=-250
42x=-420
x=-10
(3a²-5a+4)—4(-2a²-3a+3)
=3a²-5a+4+8a²+12a-12
=11a²+7a-8