1) X - 5.603 = - 1.21
X = - 1.21 + 5.603
X = 4.393
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2) Y - 13\51 = - 9\34
Y = - 9\34 + 13\51 = - 459\1734 + 442\1734 = ( - 17\1734 ) = ( - 1\102 )
Y = ( - 1\102 )
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3) 2\3 - Z = 0.4
Z = 2\3 - 2\5 = 10\15 - 6\15 = 4\15
Z = 4\15
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4) 4\7 + T = 0.7
T = 7\10 - 4\7 = 49\70 - 40\70 = 9\70
T = 9\70