7Х-12 5+ --------- =Х+13 37У-1 У+1 2У+5------- - ----- = ---------12 4 3
1)5+(7х-12)/3=х+13
(3+7х)/3=х+13
(3+7х-3х-39)/3=0
(4х-36)/3=0
х=9
2)(7у-1-3*(у+1)-4*(2у+5))/12=0
(7у-1-3у-3-8у-20)/12=0
(-4у-24)/12=0
-4у-24=0
у=-6
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1)5+(7х-12)/3=х+13
(3+7х)/3=х+13
(3+7х-3х-39)/3=0
(4х-36)/3=0
х=9
2)(7у-1-3*(у+1)-4*(2у+5))/12=0
(7у-1-3у-3-8у-20)/12=0
(-4у-24)/12=0
-4у-24=0
у=-6