position css

<div class="container history">
        <h2>HISTORY</h2>
        <div class="row mt-4">
            <div class="col-md-7">
                <div class="card flex-row flex-wrap">
                    <div class="card-header border-0">
                        <img src="//placehold.it/200" alt="">
                    </div>
                    <div class="card-block px-2">
                        <h4 class="card-title">Avanza</h4>
                        <hr>
                        <p class="card-text">Tanggal Peminjaman 21/08/2018</p>
                    </div>
                </div>
            </div>
            <div class="col-md-5">
                <div class="card flex-row flex-wrap">
                    <div class="card-header border-0">
                        <img src="//placehold.it/200" alt="">
                    </div>
                    <div class="card-block px-2">
                        <h4 class="card-title">Avanza</h4>
                        <hr>
                        <p class="card-text">Tanggal Peminjaman 21/08/2018</p>
                    </div>
                </div>
            </div>
        </div>
        <div class="row mt-4">
            <div class="col-md-12">
                <div class="card flex-row flex-wrap">
                    <div class="card-header border-0">
                        <img src="//placehold.it/200" alt="">
                    </div>
                    <div class="card-block px-2">
                        <h4 class="card-title">Avanza</h4>
                        <hr>
                        <p class="card-text">Tanggal Peminjaman 21/08/2018</p>
                    </div>
                </div>
            </div>
        </div>
    </div>