Question

Решите уравнения:
А)4x-20=0
Б)3x-5=4x+1
В)2(x+7)=9-2x

Answer 1

4X - 20 = 0
4X = 20 X = 5
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3X - 5 = 4X + 1 
4X - 3X = - 5 - 1 
X = - 6 
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2 *( X + 7 ) = 9 - 2X 
2X + 14 = 9 - 2X 
2X + 2X = 9 - 14 
4X = - 5 
X = - 1,25