Ответы на вопрос:
3(5х-7)-5(3х+4)=4(х+2)15х-21-15х-20=4х+8-21-20=4х+8 -41=4х+8 -4х=8+41 -4х=49х: (-4х) х=-12.25
3( 5x - 7) - 5( 3x + 4) = 4( x + 2) 15x - 21 - 15x - 20 = 4x + 8 - 41 = 4x + 8 - 4x = 41 + 8 - 4x = 49 4x = - 49 x = - 49 / 4 x = - 12,25
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