Giá trị của thỏa là

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- 5 7 + x = 2 3 - 5 7                         x = 2 3 - 5 7 + 5 7                         x = 2 3 " src="https://img-question-vn.ruangguru.com/cbOs05k7LQduCRlgqj3z7WPoOBgnXSnWzsw1YiqgJwSUfF-BFkjDV6aCKOYfuXNexPAN8VrHb_g0VNVeUJ_0_p1VY4vIp2_rtC4WZMbiWDX1T3y3FB3UtIjIzaB8Yl_tth9Porlq" style="width: 153.33px; height: 140.00px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="negative 5 over 7 plus x equals 2 over 3 minus 5 over 7 space space space space space space space space space space space space x equals 2 over 3 minus 5 over 7 plus 5 over 7 space space space space space space space space space space space space x equals 2 over 3">